21406462707 has 16 divisors (see below), whose sum is σ = 32651732480. Its totient is φ = 12220129152.

The previous prime is 21406462673. The next prime is 21406462709. The reversal of 21406462707 is 70726460412.

It is a de Polignac number, because none of the positive numbers 2^k-21406462707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21406462709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483943 + ... + 526320.

It is an arithmetic number, because the mean of its divisors is an integer number (2040733280).

Almost surely, 2^21406462707 is an apocalyptic number.

21406462707 is a deficient number, since it is larger than the sum of its proper divisors (11245269773).

21406462707 is a wasteful number, since it uses less digits than its factorization.

21406462707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011282.

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21406462707 in words is "twenty-one billion, four hundred six million, four hundred sixty-two thousand, seven hundred seven".