21902223245 has 32 divisors (see below), whose sum is σ = 30202841088. Its totient is φ = 14936136768.

The previous prime is 21902223227. The next prime is 21902223281. The reversal of 21902223245 is 54232220912.

It is a de Polignac number, because none of the positive numbers 2^k-21902223245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5812352 + ... + 5816118.

It is an arithmetic number, because the mean of its divisors is an integer number (943838784).

Almost surely, 2^21902223245 is an apocalyptic number.

It is an amenable number.

21902223245 is a deficient number, since it is larger than the sum of its proper divisors (8300617843).

21902223245 is a wasteful number, since it uses less digits than its factorization.

21902223245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 21902223245 in words is "twenty-one billion, nine hundred two million, two hundred twenty-three thousand, two hundred forty-five".