20065920 has 128 divisors (see below), whose sum is σ = 73146240. Its totient is φ = 4583424.

The previous prime is 20065909. The next prime is 20065931. The reversal of 20065920 is 2956002.

It is an interprime number because it is at equal distance from previous prime (20065909) and next prime (20065931).

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20065920² = 805282290892800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12694 + ... + 14186.

It is an arithmetic number, because the mean of its divisors is an integer number (571455).

Almost surely, 2^20065920 is an apocalyptic number.

20065920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 4479×4480.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20065920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36573120).

20065920 is an abundant number, since it is smaller than the sum of its proper divisors (53080320).

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

20065920 is a wasteful number, since it uses less digits than its factorization.

20065920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20065920 is about 4479.4999720951. The cubic root of 20065920 is about 271.7396586248.

The spelling of 20065920 in words is "twenty million, sixty-five thousand, nine hundred twenty".