20401400986 has 16 divisors (see below), whose sum is σ = 31353897960. Its totient is φ = 9950187520.

The previous prime is 20401400983. The next prime is 20401401001. The reversal of 20401400986 is 68900410402.

It can be written as a sum of positive squares in 4 ways, for example, as 18138971761 + 2262429225 = 134681^2 + 47565^2 .

It is not an unprimeable number, because it can be changed into a prime (20401400983) 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, 549210 + ... + 585178.

Almost surely, 2^20401400986 is an apocalyptic number.

20401400986 is a deficient number, since it is larger than the sum of its proper divisors (10952496974).

20401400986 is a wasteful number, since it uses less digits than its factorization.

20401400986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42929.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 20401400986 in words is "twenty billion, four hundred one million, four hundred thousand, nine hundred eighty-six".