20986858674 has 16 divisors (see below), whose sum is σ = 46637463840. Its totient is φ = 6995619540.

The previous prime is 20986858661. The next prime is 20986858679. The reversal of 20986858674 is 47685868902.

It is not an unprimeable number, because it can be changed into a prime (20986858679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194322712 + ... + 194322819.

It is an arithmetic number, because the mean of its divisors is an integer number (2914841490).

Almost surely, 2^20986858674 is an apocalyptic number.

20986858674 is an abundant number, since it is smaller than the sum of its proper divisors (25650605166).

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

20986858674 is a wasteful number, since it uses less digits than its factorization.

20986858674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388645542 (or 388645536 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 20986858674 in words is "twenty billion, nine hundred eighty-six million, eight hundred fifty-eight thousand, six hundred seventy-four".