21429922955 has 16 divisors (see below), whose sum is σ = 29680599744. Its totient is φ = 14549308800.

The previous prime is 21429922937. The next prime is 21429922961. The reversal of 21429922955 is 55922992412.

It is a happy number.

It is not a de Polignac number, because 21429922955 - 2¹⁴ = 21429906571 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 3027572 + ... + 3034641.

It is an arithmetic number, because the mean of its divisors is an integer number (1855037484).

Almost surely, 2^21429922955 is an apocalyptic number.

21429922955 is a deficient number, since it is larger than the sum of its proper divisors (8250676789).

21429922955 is a wasteful number, since it uses less digits than its factorization.

21429922955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6062326.

The product of its digits is 1166400, while the sum is 50.

The spelling of 21429922955 in words is "twenty-one billion, four hundred twenty-nine million, nine hundred twenty-two thousand, nine hundred fifty-five".