20852499 has 4 divisors (see below), whose sum is σ = 27803336. Its totient is φ = 13901664.

The previous prime is 20852473. The next prime is 20852501. The reversal of 20852499 is 99425802.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-20852499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20853499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475414 + ... + 3475419.

It is an arithmetic number, because the mean of its divisors is an integer number (6950834).

Almost surely, 2^20852499 is an apocalyptic number.

20852499 is a deficient number, since it is larger than the sum of its proper divisors (6950837).

20852499 is an equidigital number, since it uses as much as digits as its factorization.

20852499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950836.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 20852499 is about 4566.4536568326. The cubic root of 20852499 is about 275.2449563958.

The spelling of 20852499 in words is "twenty million, eight hundred fifty-two thousand, four hundred ninety-nine".