21373436336 has 40 divisors (see below), whose sum is σ = 47640355584. Its totient is φ = 9099374400.

The previous prime is 21373436321. The next prime is 21373436351. The reversal of 21373436336 is 63363437312.

It is an interprime number because it is at equal distance from previous prime (21373436321) and next prime (21373436351).

It is a junction number, because it is equal to n+sod(n) for n = 21373436293 and 21373436302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614990 + ... + 648813.

Almost surely, 2^21373436336 is an apocalyptic number.

It is an amenable number.

21373436336 is an abundant number, since it is smaller than the sum of its proper divisors (26266919248).

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

21373436336 is a wasteful number, since it uses less digits than its factorization.

21373436336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263969 (or 1263963 counting only the distinct ones).

The product of its digits is 489888, while the sum is 41.

The spelling of 21373436336 in words is "twenty-one billion, three hundred seventy-three million, four hundred thirty-six thousand, three hundred thirty-six".