21613542170 has 32 divisors (see below), whose sum is σ = 42726009600. Its totient is φ = 7806715840.

The previous prime is 21613542163. The next prime is 21613542179. The reversal of 21613542170 is 7124531612.

It is not an unprimeable number, because it can be changed into a prime (21613542179) 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, 642962 + ... + 675741.

It is an arithmetic number, because the mean of its divisors is an integer number (1335187800).

Almost surely, 2^21613542170 is an apocalyptic number.

21613542170 is a deficient number, since it is larger than the sum of its proper divisors (21112467430).

21613542170 is a wasteful number, since it uses less digits than its factorization.

21613542170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318870.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 21613542170 in words is "twenty-one billion, six hundred thirteen million, five hundred forty-two thousand, one hundred seventy".