20940024 has 32 divisors (see below), whose sum is σ = 59829120. Its totient is φ = 5982816.

The previous prime is 20939999. The next prime is 20940043. The reversal of 20940024 is 42004902.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62154 + ... + 62489.

It is an arithmetic number, because the mean of its divisors is an integer number (1869660).

Almost surely, 2^20940024 is an apocalyptic number.

20940024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20940024 is an abundant number, since it is smaller than the sum of its proper divisors (38889096).

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

20940024 is a wasteful number, since it uses less digits than its factorization.

20940024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124659 (or 124655 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20940024 is about 4576.0270978219. The cubic root of 20940024 is about 275.6295176166.

Adding to 20940024 its reverse (42004902), we get a palindrome (62944926).

The spelling of 20940024 in words is "twenty million, nine hundred forty thousand, twenty-four".