20513682 has 32 divisors (see below), whose sum is σ = 52099200. Its totient is φ = 5860944.

The previous prime is 20513659. The next prime is 20513687. The reversal of 20513682 is 28631502.

It is a super-2 number, since 2×20513682² = 841622298394248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20513687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26757 + ... + 27512.

It is an arithmetic number, because the mean of its divisors is an integer number (1628100).

Almost surely, 2^20513682 is an apocalyptic number.

20513682 is an abundant number, since it is smaller than the sum of its proper divisors (31585518).

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

20513682 is a wasteful number, since it uses less digits than its factorization.

20513682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54287 (or 54281 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20513682 is about 4529.2032411893. The cubic root of 20513682 is about 273.7460573649.

The spelling of 20513682 in words is "twenty million, five hundred thirteen thousand, six hundred eighty-two".