20625923 has 4 divisors (see below), whose sum is σ = 20635608. Its totient is φ = 20616240.

The previous prime is 20625919. The next prime is 20625937. The reversal of 20625923 is 32952602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20625923 - 2² = 20625919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20625973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98 + ... + 6423.

It is an arithmetic number, because the mean of its divisors is an integer number (5158902).

Almost surely, 2^20625923 is an apocalyptic number.

20625923 is a deficient number, since it is larger than the sum of its proper divisors (9685).

20625923 is an equidigital number, since it uses as much as digits as its factorization.

20625923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 20625923 is about 4541.5771489649. The cubic root of 20625923 is about 274.2444184507.

The spelling of 20625923 in words is "twenty million, six hundred twenty-five thousand, nine hundred twenty-three".