20755623 has 32 divisors (see below), whose sum is σ = 34228224. Its totient is φ = 10916352.

The previous prime is 20755613. The next prime is 20755649. The reversal of 20755623 is 32655702.

It is not a de Polignac number, because 20755623 - 2⁸ = 20755367 is a prime.

It is a super-2 number, since 2×20755623² = 861591772236258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16161 + ... + 17397.

It is an arithmetic number, because the mean of its divisors is an integer number (1069632).

Almost surely, 2^20755623 is an apocalyptic number.

20755623 is a deficient number, since it is larger than the sum of its proper divisors (13472601).

20755623 is a wasteful number, since it uses less digits than its factorization.

20755623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 20755623 is about 4555.8339521980. The cubic root of 20755623 is about 274.8180526481.

The spelling of 20755623 in words is "twenty million, seven hundred fifty-five thousand, six hundred twenty-three".