20925436 has 24 divisors (see below), whose sum is σ = 44313696. Its totient is φ = 8440320.

The previous prime is 20925433. The next prime is 20925439. The reversal of 20925436 is 63452902.

It is an interprime number because it is at equal distance from previous prime (20925433) and next prime (20925439).

It is a junction number, because it is equal to n+sod(n) for n = 20925398 and 20925407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20925433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21505 + ... + 22456.

It is an arithmetic number, because the mean of its divisors is an integer number (1846404).

Almost surely, 2^20925436 is an apocalyptic number.

It is an amenable number.

20925436 is an abundant number, since it is smaller than the sum of its proper divisors (23388260).

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

20925436 is a wasteful number, since it uses less digits than its factorization.

20925436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43989 (or 43987 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20925436 is about 4574.4328610222. The cubic root of 20925436 is about 275.5654963992.

The spelling of 20925436 in words is "twenty million, nine hundred twenty-five thousand, four hundred thirty-six".