21052577434 has 32 divisors (see below), whose sum is σ = 37585296000. Its totient is φ = 8652920640.

The previous prime is 21052577417. The next prime is 21052577477. The reversal of 21052577434 is 43477525012.

It is a super-2 number, since 2×21052577434² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113512 + ... + 234499.

It is an arithmetic number, because the mean of its divisors is an integer number (1174540500).

Almost surely, 2^21052577434 is an apocalyptic number.

21052577434 is a deficient number, since it is larger than the sum of its proper divisors (16532718566).

21052577434 is a wasteful number, since it uses less digits than its factorization.

21052577434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348198.

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 21052577434 in words is "twenty-one billion, fifty-two million, five hundred seventy-seven thousand, four hundred thirty-four".