21692745146 has 8 divisors (see below), whose sum is σ = 32612570784. Its totient is φ = 10821888220.

The previous prime is 21692745119. The next prime is 21692745149. The reversal of 21692745146 is 64154729612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21692745146² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21692745146.

It is not an unprimeable number, because it can be changed into a prime (21692745149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12241070 + ... + 12242841.

It is an arithmetic number, because the mean of its divisors is an integer number (4076571348).

Almost surely, 2^21692745146 is an apocalyptic number.

21692745146 is a deficient number, since it is larger than the sum of its proper divisors (10919825638).

21692745146 is a wasteful number, since it uses less digits than its factorization.

21692745146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24484356.

The product of its digits is 725760, while the sum is 47.

The spelling of 21692745146 in words is "twenty-one billion, six hundred ninety-two million, seven hundred forty-five thousand, one hundred forty-six".