20547960 has 32 divisors (see below), whose sum is σ = 61644240. Its totient is φ = 5479424.

The previous prime is 20547931. The next prime is 20547973. The reversal of 20547960 is 6974502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85497 + ... + 85736.

Almost surely, 2^20547960 is an apocalyptic number.

20547960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20547960 is an abundant number, since it is smaller than the sum of its proper divisors (41096280).

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

20547960 is a wasteful number, since it uses less digits than its factorization.

20547960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171247 (or 171243 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20547960 is about 4532.9857709902. The cubic root of 20547960 is about 273.8984474569.

The spelling of 20547960 in words is "twenty million, five hundred forty-seven thousand, nine hundred sixty".