21634714490 has 16 divisors (see below), whose sum is σ = 38990518560. Its totient is φ = 8643211920.

The previous prime is 21634714487. The next prime is 21634714499. The reversal of 21634714490 is 9441743612.

It is not an unprimeable number, because it can be changed into a prime (21634714499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325720 + ... + 1341939.

It is an arithmetic number, because the mean of its divisors is an integer number (2436907410).

Almost surely, 2^21634714490 is an apocalyptic number.

21634714490 is a deficient number, since it is larger than the sum of its proper divisors (17355804070).

21634714490 is a wasteful number, since it uses less digits than its factorization.

21634714490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668477.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 21634714490 in words is "twenty-one billion, six hundred thirty-four million, seven hundred fourteen thousand, four hundred ninety".