21407873304 has 16 divisors (see below), whose sum is σ = 53519683320. Its totient is φ = 7135957760.

The previous prime is 21407873273. The next prime is 21407873309. The reversal of 21407873304 is 40337870412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21407873309) 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, 445997337 + ... + 445997384.

Almost surely, 2^21407873304 is an apocalyptic number.

21407873304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21407873304 is an abundant number, since it is smaller than the sum of its proper divisors (32111810016).

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

21407873304 is a wasteful number, since it uses less digits than its factorization.

21407873304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891994730 (or 891994726 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21407873304 in words is "twenty-one billion, four hundred seven million, eight hundred seventy-three thousand, three hundred four".