20510914442 has 4 divisors (see below), whose sum is σ = 30766371666. Its totient is φ = 10255457220.

The previous prime is 20510914429. The next prime is 20510914469. The reversal of 20510914442 is 24441901502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13719671161 + 6791243281 = 117131^2 + 82409^2 .

It is a super-2 number, since 2×20510914442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20510914399 and 20510914408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5127728609 + ... + 5127728612.

Almost surely, 2^20510914442 is an apocalyptic number.

20510914442 is a deficient number, since it is larger than the sum of its proper divisors (10255457224).

20510914442 is a wasteful number, since it uses less digits than its factorization.

20510914442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255457223.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 20510914442 in words is "twenty billion, five hundred ten million, nine hundred fourteen thousand, four hundred forty-two".