20369913408 has 126 divisors (see below), whose sum is σ = 63223747314. Its totient is φ = 6267635712.

The previous prime is 20369913373. The next prime is 20369913467. The reversal of 20369913408 is 80431996302.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 339738624 + 20030174784 = 18432^2 + 141528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7285 + ... + 201972.

Almost surely, 2^20369913408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20369913408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31611873657).

20369913408 is an abundant number, since it is smaller than the sum of its proper divisors (42853833906).

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

20369913408 is a wasteful number, since it uses less digits than its factorization.

20369913408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209301 (or 209275 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 20369913408 in words is "twenty billion, three hundred sixty-nine million, nine hundred thirteen thousand, four hundred eight".