21712757486 has 16 divisors (see below), whose sum is σ = 37224001536. Its totient is φ = 9304934616.

The previous prime is 21712757483. The next prime is 21712757519. The reversal of 21712757486 is 68475721712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21712757483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301955 + ... + 366881.

It is an arithmetic number, because the mean of its divisors is an integer number (2326500096).

Almost surely, 2^21712757486 is an apocalyptic number.

21712757486 is a deficient number, since it is larger than the sum of its proper divisors (15511244050).

21712757486 is a wasteful number, since it uses less digits than its factorization.

21712757486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88823.

The product of its digits is 1317120, while the sum is 50.

The spelling of 21712757486 in words is "twenty-one billion, seven hundred twelve million, seven hundred fifty-seven thousand, four hundred eighty-six".