21426898192 has 80 divisors (see below), whose sum is σ = 50268425472. Its totient is φ = 8637235200.

The previous prime is 21426898069. The next prime is 21426898201. The reversal of 21426898192 is 29189862412.

It is a happy number.

It is a super-2 number, since 2×21426898192² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4325317 + ... + 4330267.

Almost surely, 2^21426898192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21426898192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25134212736).

21426898192 is an abundant number, since it is smaller than the sum of its proper divisors (28841527280).

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

21426898192 is a wasteful number, since it uses less digits than its factorization.

21426898192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256 (or 7250 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The spelling of 21426898192 in words is "twenty-one billion, four hundred twenty-six million, eight hundred ninety-eight thousand, one hundred ninety-two".