20012550416 has 20 divisors (see below), whose sum is σ = 41055159132. Its totient is φ = 9417670656.

The previous prime is 20012550391. The next prime is 20012550421. The reversal of 20012550416 is 61405521002.

It can be written as a sum of positive squares in 2 ways, for example, as 7999513600 + 12013036816 = 89440^2 + 109604^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36787505 + ... + 36788048.

Almost surely, 2^20012550416 is an apocalyptic number.

It is an amenable number.

20012550416 is an abundant number, since it is smaller than the sum of its proper divisors (21042608716).

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

20012550416 is a wasteful number, since it uses less digits than its factorization.

20012550416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73575578 (or 73575572 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 20012550416 in words is "twenty billion, twelve million, five hundred fifty thousand, four hundred sixteen".