21390022803 has 32 divisors (see below), whose sum is σ = 29311191616. Its totient is φ = 13870891008.

The previous prime is 21390022789. The next prime is 21390022807. The reversal of 21390022803 is 30822009312.

It is a happy number.

It is not a de Polignac number, because 21390022803 - 2²⁴ = 21373245587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21390022807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6647451 + ... + 6650667.

It is an arithmetic number, because the mean of its divisors is an integer number (915974738).

Almost surely, 2^21390022803 is an apocalyptic number.

21390022803 is a deficient number, since it is larger than the sum of its proper divisors (7921168813).

21390022803 is a wasteful number, since it uses less digits than its factorization.

21390022803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 21390022803 in words is "twenty-one billion, three hundred ninety million, twenty-two thousand, eight hundred three".