21145306462 has 16 divisors (see below), whose sum is σ = 37133222112. Its totient is φ = 8841242880.

The previous prime is 21145306447. The next prime is 21145306577. The reversal of 21145306462 is 26460354112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18418683 + ... + 18419830.

It is an arithmetic number, because the mean of its divisors is an integer number (2320826382).

Almost surely, 2^21145306462 is an apocalyptic number.

21145306462 is a deficient number, since it is larger than the sum of its proper divisors (15987915650).

21145306462 is a wasteful number, since it uses less digits than its factorization.

21145306462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36838563.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 21145306462 in words is "twenty-one billion, one hundred forty-five million, three hundred six thousand, four hundred sixty-two".