20615264434 has 8 divisors (see below), whose sum is σ = 30934236060. Its totient is φ = 10303852416.

The previous prime is 20615264393. The next prime is 20615264443. The reversal of 20615264434 is 43446251602.

It can be written as a sum of positive squares in 2 ways, for example, as 19239077025 + 1376187409 = 138705^2 + 37097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20615264393 and 20615264402.

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, 1883079 + ... + 1893994.

Almost surely, 2^20615264434 is an apocalyptic number.

20615264434 is a deficient number, since it is larger than the sum of its proper divisors (10318971626).

20615264434 is a wasteful number, since it uses less digits than its factorization.

20615264434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779804.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 20615264434 in words is "twenty billion, six hundred fifteen million, two hundred sixty-four thousand, four hundred thirty-four".