21150070320 has 40 divisors (see below), whose sum is σ = 65565218736. Its totient is φ = 5640018688.

The previous prime is 21150070303. The next prime is 21150070321. The reversal of 21150070320 is 2307005112.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (21150070321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44062407 + ... + 44062886.

Almost surely, 2^21150070320 is an apocalyptic number.

21150070320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21150070320 is an abundant number, since it is smaller than the sum of its proper divisors (44415148416).

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

21150070320 is a wasteful number, since it uses less digits than its factorization.

21150070320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88125309 (or 88125303 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

Adding to 21150070320 its reverse (2307005112), we get a palindrome (23457075432).

The spelling of 21150070320 in words is "twenty-one billion, one hundred fifty million, seventy thousand, three hundred twenty".