20296920 has 128 divisors (see below), whose sum is σ = 70755840. Its totient is φ = 4561920.

The previous prime is 20296891. The next prime is 20296949. The reversal of 20296920 is 2969202.

It is an interprime number because it is at equal distance from previous prime (20296891) and next prime (20296949).

It is a super-2 number, since 2×20296920² = 823929922972800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61155 + ... + 61485.

It is an arithmetic number, because the mean of its divisors is an integer number (552780).

Almost surely, 2^20296920 is an apocalyptic number.

20296920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20296920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35377920).

20296920 is an abundant number, since it is smaller than the sum of its proper divisors (50458920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20296920 is a wasteful number, since it uses less digits than its factorization.

20296920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20296920 is about 4505.2103169552. The cubic root of 20296920 is about 272.7784433278.

The spelling of 20296920 in words is "twenty million, two hundred ninety-six thousand, nine hundred twenty".