20543916 has 12 divisors (see below), whose sum is σ = 47935832. Its totient is φ = 6847968.

The previous prime is 20543891. The next prime is 20543927. The reversal of 20543916 is 61934502.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855985 + ... + 856008.

Almost surely, 2^20543916 is an apocalyptic number.

It is an amenable number.

20543916 is an abundant number, since it is smaller than the sum of its proper divisors (27391916).

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

20543916 is a wasteful number, since it uses less digits than its factorization.

20543916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712000 (or 1711998 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20543916 is about 4532.5396854302. The cubic root of 20543916 is about 273.8804778224.

The spelling of 20543916 in words is "twenty million, five hundred forty-three thousand, nine hundred sixteen".