21796429824 has 168 divisors, whose sum is σ = 67809957852. Its totient is φ = 6706298880.

The previous prime is 21796429807. The next prime is 21796429843. The reversal of 21796429824 is 42892469712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17806233600 + 3990196224 = 133440^2 + 63168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 947094 + ... + 969834.

Almost surely, 2^21796429824 is an apocalyptic number.

21796429824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21796429824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33904978926).

21796429824 is an abundant number, since it is smaller than the sum of its proper divisors (46013528028).

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

21796429824 is a wasteful number, since it uses less digits than its factorization.

21796429824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22786 (or 22759 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 21796429824 in words is "twenty-one billion, seven hundred ninety-six million, four hundred twenty-nine thousand, eight hundred twenty-four".