21700347524 has 12 divisors (see below), whose sum is σ = 37982512848. Its totient is φ = 10848201000.

The previous prime is 21700347521. The next prime is 21700347577. The reversal of 21700347524 is 42574300712.

It is not an unprimeable number, because it can be changed into a prime (21700347521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468302 + ... + 512549.

It is an arithmetic number, because the mean of its divisors is an integer number (3165209404).

Almost surely, 2^21700347524 is an apocalyptic number.

It is an amenable number.

21700347524 is a deficient number, since it is larger than the sum of its proper divisors (16282165324).

21700347524 is a wasteful number, since it uses less digits than its factorization.

21700347524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986386 (or 986384 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The spelling of 21700347524 in words is "twenty-one billion, seven hundred million, three hundred forty-seven thousand, five hundred twenty-four".