20960400 has 60 divisors (see below), whose sum is σ = 67146992. Its totient is φ = 5589120.

The previous prime is 20960377. The next prime is 20960413. The reversal of 20960400 is 406902.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7534 + ... + 9933.

Almost surely, 2^20960400 is an apocalyptic number.

20960400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20960400 is an abundant number, since it is smaller than the sum of its proper divisors (46186592).

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

20960400 is a wasteful number, since it uses less digits than its factorization.

20960400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17488 (or 17477 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20960400 is about 4578.2529418983. The cubic root of 20960400 is about 275.7188904270.

The spelling of 20960400 in words is "twenty million, nine hundred sixty thousand, four hundred".