20986892 has 6 divisors (see below), whose sum is σ = 36727068. Its totient is φ = 10493444.

The previous prime is 20986883. The next prime is 20986897. The reversal of 20986892 is 29868902.

It is not an unprimeable number, because it can be changed into a prime (20986897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2623358 + ... + 2623365.

It is an arithmetic number, because the mean of its divisors is an integer number (6121178).

Almost surely, 2^20986892 is an apocalyptic number.

It is an amenable number.

20986892 is a deficient number, since it is larger than the sum of its proper divisors (15740176).

20986892 is a wasteful number, since it uses less digits than its factorization.

20986892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246727 (or 5246725 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 20986892 is about 4581.1452716542. The cubic root of 20986892 is about 275.8350025506.

The spelling of 20986892 in words is "twenty million, nine hundred eighty-six thousand, eight hundred ninety-two".