21142740662 has 16 divisors (see below), whose sum is σ = 33797094912. Its totient is φ = 9896601000.

The previous prime is 21142740653. The next prime is 21142740733. The reversal of 21142740662 is 26604724112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4887464 + ... + 4891787.

It is an arithmetic number, because the mean of its divisors is an integer number (2112318432).

Almost surely, 2^21142740662 is an apocalyptic number.

21142740662 is a deficient number, since it is larger than the sum of its proper divisors (12654354250).

21142740662 is a wasteful number, since it uses less digits than its factorization.

21142740662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9779323.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 21142740662 in words is "twenty-one billion, one hundred forty-two million, seven hundred forty thousand, six hundred sixty-two".