20536986 has 32 divisors (see below), whose sum is σ = 45783360. Its totient is φ = 6103296.

The previous prime is 20536951. The next prime is 20536993. The reversal of 20536986 is 68963502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3361 + ... + 7236.

It is an arithmetic number, because the mean of its divisors is an integer number (1430730).

Almost surely, 2^20536986 is an apocalyptic number.

20536986 is an abundant number, since it is smaller than the sum of its proper divisors (25246374).

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

20536986 is a wasteful number, since it uses less digits than its factorization.

20536986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 20536986 is about 4531.7751488793. The cubic root of 20536986 is about 273.8496786770.

The spelling of 20536986 in words is "twenty million, five hundred thirty-six thousand, nine hundred eighty-six".