21762197834 has 32 divisors (see below), whose sum is σ = 35286021120. Its totient is φ = 10006545600.

The previous prime is 21762197771. The next prime is 21762197839. The reversal of 21762197834 is 43879126712.

It is not an unprimeable number, because it can be changed into a prime (21762197839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9718487 + ... + 9720725.

It is an arithmetic number, because the mean of its divisors is an integer number (1102688160).

Almost surely, 2^21762197834 is an apocalyptic number.

21762197834 is a deficient number, since it is larger than the sum of its proper divisors (13523823286).

21762197834 is a wasteful number, since it uses less digits than its factorization.

21762197834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486.

The product of its digits is 1016064, while the sum is 50.

The spelling of 21762197834 in words is "twenty-one billion, seven hundred sixty-two million, one hundred ninety-seven thousand, eight hundred thirty-four".