21884291930 has 32 divisors (see below), whose sum is σ = 41782372560. Its totient is φ = 8224276480.

The previous prime is 21884291921. The next prime is 21884291939. The reversal of 21884291930 is 3919248812.

It is an interprime number because it is at equal distance from previous prime (21884291921) and next prime (21884291939).

It can be written as a sum of positive squares in 8 ways, for example, as 11567217601 + 10317074329 = 107551^2 + 101573^2 .

It is not an unprimeable number, because it can be changed into a prime (21884291939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16391 + ... + 209850.

Almost surely, 2^21884291930 is an apocalyptic number.

21884291930 is a deficient number, since it is larger than the sum of its proper divisors (19898080630).

21884291930 is a wasteful number, since it uses less digits than its factorization.

21884291930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226834.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 21884291930 in words is "twenty-one billion, eight hundred eighty-four million, two hundred ninety-one thousand, nine hundred thirty".