20023685 has 24 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 13919840.

The previous prime is 20023651. The next prime is 20023693. The reversal of 20023685 is 58632002.

It is not a de Polignac number, because 20023685 - 2⁸ = 20023429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13196 + ... + 14634.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^20023685 is an apocalyptic number.

It is an amenable number.

20023685 is a deficient number, since it is larger than the sum of its proper divisors (7555195).

20023685 is a wasteful number, since it uses less digits than its factorization.

20023685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20023685 is about 4474.7832349735. The cubic root of 20023685 is about 271.5488710246.

Adding to 20023685 its reverse (58632002), we get a palindrome (78655687).

The spelling of 20023685 in words is "twenty million, twenty-three thousand, six hundred eighty-five".