20871675 has 60 divisors (see below), whose sum is σ = 42221256. Its totient is φ = 10108800.

The previous prime is 20871667. The next prime is 20871689. The reversal of 20871675 is 57617802.

It is not a de Polignac number, because 20871675 - 2³ = 20871667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 21807 + ... + 22743.

Almost surely, 2^20871675 is an apocalyptic number.

20871675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20871675 is an abundant number, since it is smaller than the sum of its proper divisors (21349581).

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

20871675 is a wasteful number, since it uses less digits than its factorization.

20871675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 20871675 is about 4568.5528343229. The cubic root of 20871675 is about 275.3293024846.

The spelling of 20871675 in words is "twenty million, eight hundred seventy-one thousand, six hundred seventy-five".