21388422835 has 48 divisors (see below), whose sum is σ = 29322660960. Its totient is φ = 14928675840.

The previous prime is 21388422827. The next prime is 21388422877. The reversal of 21388422835 is 53822488312.

It is not a de Polignac number, because 21388422835 - 2³ = 21388422827 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8363377 + ... + 8365933.

It is an arithmetic number, because the mean of its divisors is an integer number (610888770).

Almost surely, 2^21388422835 is an apocalyptic number.

21388422835 is a deficient number, since it is larger than the sum of its proper divisors (7934238125).

21388422835 is a wasteful number, since it uses less digits than its factorization.

21388422835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128 (or 3115 counting only the distinct ones).

The product of its digits is 737280, while the sum is 46.

The spelling of 21388422835 in words is "twenty-one billion, three hundred eighty-eight million, four hundred twenty-two thousand, eight hundred thirty-five".