21422734645 has 16 divisors (see below), whose sum is σ = 27953557632. Its totient is φ = 15666269760.

The previous prime is 21422734609. The next prime is 21422734651. The reversal of 21422734645 is 54643722412.

It is not a de Polignac number, because 21422734645 - 2¹⁵ = 21422701877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21422734598 and 21422734607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1593211 + ... + 1606600.

It is an arithmetic number, because the mean of its divisors is an integer number (1747097352).

Almost surely, 2^21422734645 is an apocalyptic number.

It is an amenable number.

21422734645 is a deficient number, since it is larger than the sum of its proper divisors (6530822987).

21422734645 is a wasteful number, since it uses less digits than its factorization.

21422734645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199932.

The product of its digits is 322560, while the sum is 40.

The spelling of 21422734645 in words is "twenty-one billion, four hundred twenty-two million, seven hundred thirty-four thousand, six hundred forty-five".