21022418984 has 16 divisors (see below), whose sum is σ = 45048040800. Its totient is φ = 9009608112.

The previous prime is 21022418983. The next prime is 21022418987. The reversal of 21022418984 is 48981422012.

It is not an unprimeable number, because it can be changed into a prime (21022418983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187700114 + ... + 187700225.

It is an arithmetic number, because the mean of its divisors is an integer number (2815502550).

Almost surely, 2^21022418984 is an apocalyptic number.

It is an amenable number.

21022418984 is an abundant number, since it is smaller than the sum of its proper divisors (24025621816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022418984 is a wasteful number, since it uses less digits than its factorization.

21022418984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375400352 (or 375400348 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 21022418984 in words is "twenty-one billion, twenty-two million, four hundred eighteen thousand, nine hundred eighty-four".