20326920 has 64 divisors (see below), whose sum is σ = 61326720. Its totient is φ = 5389824.

The previous prime is 20326919. The next prime is 20326921. The reversal of 20326920 is 2962302.

It is an interprime number because it is at equal distance from previous prime (20326919) and next prime (20326921).

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

It is not an unprimeable number, because it can be changed into a prime (20326921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27597 + ... + 28323.

It is an arithmetic number, because the mean of its divisors is an integer number (958230).

Almost surely, 2^20326920 is an apocalyptic number.

20326920 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 20326920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663360).

20326920 is an abundant number, since it is smaller than the sum of its proper divisors (40999800).

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

20326920 is a wasteful number, since it uses less digits than its factorization.

20326920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20326920 is about 4508.5385658770. The cubic root of 20326920 is about 272.9127711763.

The spelling of 20326920 in words is "twenty million, three hundred twenty-six thousand, nine hundred twenty".