20677420 has 24 divisors (see below), whose sum is σ = 44244144. Its totient is φ = 8114496.

The previous prime is 20677417. The next prime is 20677421. The reversal of 20677420 is 2477602.

It is not an unprimeable number, because it can be changed into a prime (20677421) 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, 8694 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (1843506).

Almost surely, 2^20677420 is an apocalyptic number.

20677420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20677420 is an abundant number, since it is smaller than the sum of its proper divisors (23566724).

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

20677420 is a wasteful number, since it uses less digits than its factorization.

20677420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19569 (or 19567 counting only the distinct ones).

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

The square root of 20677420 is about 4547.2431208371. The cubic root of 20677420 is about 274.4724652569.

The spelling of 20677420 in words is "twenty million, six hundred seventy-seven thousand, four hundred twenty".