21700733070 has 64 divisors (see below), whose sum is σ = 55170331200. Its totient is φ = 5443995648.

The previous prime is 21700733069. The next prime is 21700733077. The reversal of 21700733070 is 7033700712.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700733077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1291644 + ... + 1308336.

It is an arithmetic number, because the mean of its divisors is an integer number (862036425).

Almost surely, 2^21700733070 is an apocalyptic number.

21700733070 is an abundant number, since it is smaller than the sum of its proper divisors (33469598130).

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

21700733070 is a wasteful number, since it uses less digits than its factorization.

21700733070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19269.

The product of its (nonzero) digits is 6174, while the sum is 30.

The spelling of 21700733070 in words is "twenty-one billion, seven hundred million, seven hundred thirty-three thousand, seventy".