20536880 has 180 divisors, whose sum is σ = 62085312. Its totient is φ = 6289920.

The previous prime is 20536847. The next prime is 20536889. The reversal of 20536880 is 8863502.

20536880 = T₁₇₇₁ + T₁₇₇₂ + ... + T₁₇₈₃.

It is not an unprimeable number, because it can be changed into a prime (20536889) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 662465 + ... + 662495.

Almost surely, 2^20536880 is an apocalyptic number.

20536880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20536880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31042656).

20536880 is an abundant number, since it is smaller than the sum of its proper divisors (41548432).

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

20536880 is a wasteful number, since it uses less digits than its factorization.

20536880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20536880 is about 4531.7634536679. The cubic root of 20536880 is about 273.8492075252.

The spelling of 20536880 in words is "twenty million, five hundred thirty-six thousand, eight hundred eighty".