21896442570 has 16 divisors (see below), whose sum is σ = 52551462240. Its totient is φ = 5839051344.

The previous prime is 21896442553. The next prime is 21896442577. The reversal of 21896442570 is 7524469812.

It is not an unprimeable number, because it can be changed into a prime (21896442577) 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, 364940680 + ... + 364940739.

It is an arithmetic number, because the mean of its divisors is an integer number (3284466390).

Almost surely, 2^21896442570 is an apocalyptic number.

21896442570 is an abundant number, since it is smaller than the sum of its proper divisors (30655019670).

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

21896442570 is a wasteful number, since it uses less digits than its factorization.

21896442570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729881429.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 21896442570 in words is "twenty-one billion, eight hundred ninety-six million, four hundred forty-two thousand, five hundred seventy".