21670546950 has 96 divisors (see below), whose sum is σ = 64307863200. Its totient is φ = 5334284160.

The previous prime is 21670546943. The next prime is 21670546967. The reversal of 21670546950 is 5964507612.

21670546950 is a `hidden beast` number, since 2 + 16 + 7 + 0 + 546 + 95 + 0 = 666.

It is a super-2 number, since 2×21670546950² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 21670546896 and 21670546905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 599845 + ... + 634944.

It is an arithmetic number, because the mean of its divisors is an integer number (669873575).

Almost surely, 2^21670546950 is an apocalyptic number.

21670546950 is an abundant number, since it is smaller than the sum of its proper divisors (42637316250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21670546950 is a wasteful number, since it uses less digits than its factorization.

21670546950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234823 (or 1234812 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 21670546950 in words is "twenty-one billion, six hundred seventy million, five hundred forty-six thousand, nine hundred fifty".