20268940 has 24 divisors (see below), whose sum is σ = 42672672. Its totient is φ = 8087040.

The previous prime is 20268931. The next prime is 20268959. The reversal of 20268940 is 4986202.

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, 8700 + ... + 10780.

It is an arithmetic number, because the mean of its divisors is an integer number (1778028).

Almost surely, 2^20268940 is an apocalyptic number.

20268940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20268940 is an abundant number, since it is smaller than the sum of its proper divisors (22403732).

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

20268940 is a wasteful number, since it uses less digits than its factorization.

20268940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577 (or 2575 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20268940 is about 4502.1039525982. The cubic root of 20268940 is about 272.6530408746.

The spelling of 20268940 in words is "twenty million, two hundred sixty-eight thousand, nine hundred forty".