20920732450 has 24 divisors (see below), whose sum is σ = 38921364900. Its totient is φ = 8366400000.

The previous prime is 20920732387. The next prime is 20920732487. The reversal of 20920732450 is 5423702902.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19936592809 + 984139641 = 141197^2 + 31371^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187450 + ... + 277450.

Almost surely, 2^20920732450 is an apocalyptic number.

20920732450 is a deficient number, since it is larger than the sum of its proper divisors (18000632450).

20920732450 is a wasteful number, since it uses less digits than its factorization.

20920732450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94662 (or 94657 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20920732450 in words is "twenty billion, nine hundred twenty million, seven hundred thirty-two thousand, four hundred fifty".