20732470474 has 4 divisors (see below), whose sum is σ = 31098705714. Its totient is φ = 10366235236.

The previous prime is 20732470397. The next prime is 20732470477. The reversal of 20732470474 is 47407423702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47407423702 = 2 ⋅23703711851.

It can be written as a sum of positive squares in only one way, i.e., 17629200625 + 3103269849 = 132775^2 + 55707^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20732470477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5183117617 + ... + 5183117620.

Almost surely, 2^20732470474 is an apocalyptic number.

20732470474 is a deficient number, since it is larger than the sum of its proper divisors (10366235240).

20732470474 is a wasteful number, since it uses less digits than its factorization.

20732470474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366235239.

The product of its (nonzero) digits is 263424, while the sum is 40.

The spelling of 20732470474 in words is "twenty billion, seven hundred thirty-two million, four hundred seventy thousand, four hundred seventy-four".