20852057 has 8 divisors (see below), whose sum is σ = 21879552. Its totient is φ = 19846800.

The previous prime is 20852023. The next prime is 20852087. The reversal of 20852057 is 75025802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20852057 - 2⁸ = 20851801 is a prime.

It is a super-2 number, since 2×20852057² = 869616562262498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20852087) 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, 3623 + ... + 7404.

It is an arithmetic number, because the mean of its divisors is an integer number (2734944).

Almost surely, 2^20852057 is an apocalyptic number.

It is an amenable number.

20852057 is a deficient number, since it is larger than the sum of its proper divisors (1027495).

20852057 is a wasteful number, since it uses less digits than its factorization.

20852057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11119.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 20852057 is about 4566.4052601581. The cubic root of 20852057 is about 275.2430116388.

Adding to 20852057 its reverse (75025802), we get a palindrome (95877859).

The spelling of 20852057 in words is "twenty million, eight hundred fifty-two thousand, fifty-seven".