20700499 has 4 divisors (see below), whose sum is σ = 20748960. Its totient is φ = 20652040.

The previous prime is 20700469. The next prime is 20700503. The reversal of 20700499 is 99400702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99400702 = 2 ⋅49700351.

It is a cyclic number.

It is not a de Polignac number, because 20700499 - 2⁷ = 20700371 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20700499.

It is not an unprimeable number, because it can be changed into a prime (20700469) 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, 23584 + ... + 24445.

It is an arithmetic number, because the mean of its divisors is an integer number (5187240).

Almost surely, 2^20700499 is an apocalyptic number.

20700499 is a deficient number, since it is larger than the sum of its proper divisors (48461).

20700499 is an equidigital number, since it uses as much as digits as its factorization.

20700499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48460.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 20700499 is about 4549.7801045765. The cubic root of 20700499 is about 274.5745443159.

The spelling of 20700499 in words is "twenty million, seven hundred thousand, four hundred ninety-nine".