20086521 has 48 divisors (see below), whose sum is σ = 35086464. Its totient is φ = 10112256.

The previous prime is 20086519. The next prime is 20086631. The reversal of 20086521 is 12568002.

It is not a de Polignac number, because 20086521 - 2¹ = 20086519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20086491 and 20086500.

It is not an unprimeable number, because it can be changed into a prime (20086421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43725 + ... + 44181.

It is an arithmetic number, because the mean of its divisors is an integer number (730968).

Almost surely, 2^20086521 is an apocalyptic number.

20086521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20086521 is a deficient number, since it is larger than the sum of its proper divisors (14999943).

20086521 is a wasteful number, since it uses less digits than its factorization.

20086521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20086521 is about 4481.7988576017. The cubic root of 20086521 is about 271.8326221172.

The spelling of 20086521 in words is "twenty million, eighty-six thousand, five hundred twenty-one".