20057700 has 144 divisors (see below), whose sum is σ = 64648640. Its totient is φ = 4769280.

The previous prime is 20057683. The next prime is 20057717. The reversal of 20057700 is 775002.

It is an interprime number because it is at equal distance from previous prime (20057683) and next prime (20057717).

It is a super-2 number, since 2×20057700² = 804622658580000, which contains 22 as substring.

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, 144231 + ... + 144369.

Almost surely, 2^20057700 is an apocalyptic number.

20057700 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 20057700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32324320).

20057700 is an abundant number, since it is smaller than the sum of its proper divisors (44590940).

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

20057700 is a wasteful number, since it uses less digits than its factorization.

20057700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 21.

The square root of 20057700 is about 4478.5823649901. The cubic root of 20057700 is about 271.7025475251.

The spelling of 20057700 in words is "twenty million, fifty-seven thousand, seven hundred".