20708357400 has 192 divisors, whose sum is σ = 71962135200. Its totient is φ = 5473198080.

The previous prime is 20708357363. The next prime is 20708357419. The reversal of 20708357400 is 475380702.

20708357400 is a `hidden beast` number, since 2 + 0 + 7 + 0 + 83 + 574 + 0 + 0 = 666.

It is a super-2 number, since 2×20708357400² (a number of 21 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 593232 + ... + 627168.

Almost surely, 2^20708357400 is an apocalyptic number.

20708357400 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 20708357400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35981067600).

20708357400 is an abundant number, since it is smaller than the sum of its proper divisors (51253777800).

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

20708357400 is a wasteful number, since it uses less digits than its factorization.

20708357400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34075 (or 34060 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 20708357400 in words is "twenty billion, seven hundred eight million, three hundred fifty-seven thousand, four hundred".