20077760 has 28 divisors (see below), whose sum is σ = 47810928. Its totient is φ = 8030976.

The previous prime is 20077751. The next prime is 20077769. The reversal of 20077760 is 6777002.

It is an interprime number because it is at equal distance from previous prime (20077751) and next prime (20077769).

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20077769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31052 + ... + 31691.

Almost surely, 2^20077760 is an apocalyptic number.

20077760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20077760 is an abundant number, since it is smaller than the sum of its proper divisors (27733168).

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

20077760 is an equidigital number, since it uses as much as digits as its factorization.

20077760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62760 (or 62750 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 20077760 is about 4480.8213532789. The cubic root of 20077760 is about 271.7930952469.

The spelling of 20077760 in words is "twenty million, seventy-seven thousand, seven hundred sixty".