20820675 has 36 divisors (see below), whose sum is σ = 36377880. Its totient is φ = 10506240.

The previous prime is 20820649. The next prime is 20820689. The reversal of 20820675 is 57602802.

It is not a de Polignac number, because 20820675 - 2⁸ = 20820419 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26691 + ... + 27459.

Almost surely, 2^20820675 is an apocalyptic number.

20820675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20820675 is a deficient number, since it is larger than the sum of its proper divisors (15557205).

20820675 is a wasteful number, since it uses less digits than its factorization.

20820675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20820675 is about 4562.9677842387. The cubic root of 20820675 is about 275.1048635894.

The spelling of 20820675 in words is "twenty million, eight hundred twenty thousand, six hundred seventy-five".