20277460 has 24 divisors (see below), whose sum is σ = 48666240. Its totient is φ = 6952224.

The previous prime is 20277457. The next prime is 20277461. The reversal of 20277460 is 6477202.

It is a super-2 number, since 2×20277460² = 822350768103200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20277461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72280 + ... + 72559.

It is an arithmetic number, because the mean of its divisors is an integer number (2027760).

Almost surely, 2^20277460 is an apocalyptic number.

20277460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20277460 is an abundant number, since it is smaller than the sum of its proper divisors (28388780).

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

20277460 is a wasteful number, since it uses less digits than its factorization.

20277460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144855 (or 144853 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20277460 is about 4503.0500774475. The cubic root of 20277460 is about 272.6912385388.

The spelling of 20277460 in words is "twenty million, two hundred seventy-seven thousand, four hundred sixty".