20675560 has 32 divisors (see below), whose sum is σ = 46672200. Its totient is φ = 8243200.

The previous prime is 20675539. The next prime is 20675569. The reversal of 20675560 is 6557602.

It can be written as a sum of positive squares in 4 ways, for example, as 20629764 + 45796 = 4542^2 + 214^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675569) 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, 15396 + ... + 16684.

Almost surely, 2^20675560 is an apocalyptic number.

20675560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20675560 is an abundant number, since it is smaller than the sum of its proper divisors (25996640).

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

20675560 is a wasteful number, since it uses less digits than its factorization.

20675560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 20675560 is about 4547.0385967132. The cubic root of 20675560 is about 274.4642351184.

The spelling of 20675560 in words is "twenty million, six hundred seventy-five thousand, five hundred sixty".