20604893400 has 672 divisors, whose sum is σ = 88459025760. Its totient is φ = 4344606720.

The previous prime is 20604893383. The next prime is 20604893417. The reversal of 20604893400 is 439840602.

It is a happy number.

20604893400 is a `hidden beast` number, since 2 + 0 + 604 + 8 + 9 + 3 + 40 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20604893383) and next prime (20604893417).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 13267024 + ... + 13268576.

It is an arithmetic number, because the mean of its divisors is an integer number (131635455).

Almost surely, 2^20604893400 is an apocalyptic number.

20604893400 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 20604893400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44229512880).

20604893400 is an abundant number, since it is smaller than the sum of its proper divisors (67854132360).

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

20604893400 is a wasteful number, since it uses less digits than its factorization.

20604893400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20604893400 in words is "twenty billion, six hundred four million, eight hundred ninety-three thousand, four hundred".