21442633604 has 48 divisors (see below), whose sum is σ = 43659544320. Its totient is φ = 9024798720.

The previous prime is 21442633519. The next prime is 21442633651. The reversal of 21442633604 is 40633624412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489932 + ... + 531900.

It is an arithmetic number, because the mean of its divisors is an integer number (909573840).

Almost surely, 2^21442633604 is an apocalyptic number.

It is an amenable number.

21442633604 is an abundant number, since it is smaller than the sum of its proper divisors (22216910716).

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

21442633604 is a wasteful number, since it uses less digits than its factorization.

21442633604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42308 (or 42306 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 21442633604 in words is "twenty-one billion, four hundred forty-two million, six hundred thirty-three thousand, six hundred four".