20401974416 has 40 divisors (see below), whose sum is σ = 39871015800. Its totient is φ = 10113048576.

The previous prime is 20401974391. The next prime is 20401974433. The reversal of 20401974416 is 61447910402.

It can be written as a sum of positive squares in 4 ways, for example, as 12099120016 + 8302854400 = 109996^2 + 91120^2 .

It is a super-2 number, since 2×20401974416² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20401974416.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893510 + ... + 916058.

It is an arithmetic number, because the mean of its divisors is an integer number (996775395).

Almost surely, 2^20401974416 is an apocalyptic number.

It is an amenable number.

20401974416 is a deficient number, since it is larger than the sum of its proper divisors (19469041384).

20401974416 is a wasteful number, since it uses less digits than its factorization.

20401974416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23043 (or 23037 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 20401974416 in words is "twenty billion, four hundred one million, nine hundred seventy-four thousand, four hundred sixteen".