20077400 has 48 divisors (see below), whose sum is σ = 53352240. Its totient is φ = 6883200.

The previous prime is 20077363. The next prime is 20077403. The reversal of 20077400 is 477002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5771 + ... + 8570.

It is an arithmetic number, because the mean of its divisors is an integer number (1111505).

Almost surely, 2^20077400 is an apocalyptic number.

20077400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20077400 is an abundant number, since it is smaller than the sum of its proper divisors (33274840).

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

20077400 is a wasteful number, since it uses less digits than its factorization.

20077400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14364 (or 14355 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 20077400 is about 4480.7811818923. The cubic root of 20077400 is about 271.7914707945.

The spelling of 20077400 in words is "twenty million, seventy-seven thousand, four hundred".