20996712 has 64 divisors (see below), whose sum is σ = 63633600. Its totient is φ = 6361920.

The previous prime is 20996687. The next prime is 20996713. The reversal of 20996712 is 21769902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20996713) 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, 2043 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (994275).

Almost surely, 2^20996712 is an apocalyptic number.

20996712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20996712 is an abundant number, since it is smaller than the sum of its proper divisors (42636888).

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

20996712 is a wasteful number, since it uses less digits than its factorization.

20996712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863 (or 8853 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 20996712 is about 4582.2169307007. The cubic root of 20996712 is about 275.8780179299.

The spelling of 20996712 in words is "twenty million, nine hundred ninety-six thousand, seven hundred twelve".