21160164530 has 32 divisors (see below), whose sum is σ = 40139712000. Its totient is φ = 8009235072.

The previous prime is 21160164451. The next prime is 21160164533. The reversal of 21160164530 is 3546106112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21160164493 and 21160164502.

It is not an unprimeable number, because it can be changed into a prime (21160164533) 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, 99446 + ... + 228494.

It is an arithmetic number, because the mean of its divisors is an integer number (1254366000).

Almost surely, 2^21160164530 is an apocalyptic number.

21160164530 is a deficient number, since it is larger than the sum of its proper divisors (18979547470).

21160164530 is a wasteful number, since it uses less digits than its factorization.

21160164530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129938.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 21160164530 in words is "twenty-one billion, one hundred sixty million, one hundred sixty-four thousand, five hundred thirty".