20634436700 has 72 divisors (see below), whose sum is σ = 46564519680. Its totient is φ = 7927225600.

The previous prime is 20634436687. The next prime is 20634436727. The reversal of 20634436700 is 763443602.

It is a super-3 number, since 3×20634436700³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535274 + ... + 572526.

It is an arithmetic number, because the mean of its divisors is an integer number (646729440).

Almost surely, 2^20634436700 is an apocalyptic number.

20634436700 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 20634436700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23282259840).

20634436700 is an abundant number, since it is smaller than the sum of its proper divisors (25930082980).

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

20634436700 is a wasteful number, since it uses less digits than its factorization.

20634436700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37487 (or 37480 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 35.

The spelling of 20634436700 in words is "twenty billion, six hundred thirty-four million, four hundred thirty-six thousand, seven hundred".