21107455534 has 64 divisors (see below), whose sum is σ = 36934755840. Its totient is φ = 8951662720.

The previous prime is 21107455531. The next prime is 21107455573. The reversal of 21107455534 is 43555470112.

It is a junction number, because it is equal to n+sod(n) for n = 21107455493 and 21107455502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21107455531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4798224 + ... + 4802620.

It is an arithmetic number, because the mean of its divisors is an integer number (577105560).

Almost surely, 2^21107455534 is an apocalyptic number.

21107455534 is a deficient number, since it is larger than the sum of its proper divisors (15827300306).

21107455534 is a wasteful number, since it uses less digits than its factorization.

21107455534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 21107455534 in words is "twenty-one billion, one hundred seven million, four hundred fifty-five thousand, five hundred thirty-four".