20623400 has 48 divisors (see below), whose sum is σ = 54803040. Its totient is φ = 7070400.

The previous prime is 20623399. The next prime is 20623411. The reversal of 20623400 is 432602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5966 + ... + 8765.

It is an arithmetic number, because the mean of its divisors is an integer number (1141730).

Almost surely, 2^20623400 is an apocalyptic number.

20623400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20623400 is an abundant number, since it is smaller than the sum of its proper divisors (34179640).

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

20623400 is a wasteful number, since it uses less digits than its factorization.

20623400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14754 (or 14745 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20623400 is about 4541.2993735274. The cubic root of 20623400 is about 274.2332359712.

The spelling of 20623400 in words is "twenty million, six hundred twenty-three thousand, four hundred".