20346613440 has 224 divisors, whose sum is σ = 67929312960. Its totient is φ = 5152358400.

The previous prime is 20346613433. The next prime is 20346613459. The reversal of 20346613440 is 4431664302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1692250 + ... + 1704230.

Almost surely, 2^20346613440 is an apocalyptic number.

20346613440 is a gapful number since it is divisible by the number (20) 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 20346613440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33964656480).

20346613440 is an abundant number, since it is smaller than the sum of its proper divisors (47582699520).

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

20346613440 is a wasteful number, since it uses less digits than its factorization.

20346613440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12091 (or 12081 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The spelling of 20346613440 in words is "twenty billion, three hundred forty-six million, six hundred thirteen thousand, four hundred forty".