20790819 has 24 divisors (see below), whose sum is σ = 34441472. Its totient is φ = 11838960.

The previous prime is 20790817. The next prime is 20790821. The reversal of 20790819 is 91809702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20790817) and next prime (20790821).

It is not a de Polignac number, because 20790819 - 2¹ = 20790817 is a prime.

It is a super-2 number, since 2×20790819² = 864516309381522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20790811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32634 + ... + 33264.

Almost surely, 2^20790819 is an apocalyptic number.

20790819 is a deficient number, since it is larger than the sum of its proper divisors (13650653).

20790819 is a wasteful number, since it uses less digits than its factorization.

20790819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 20790819 is about 4559.6950555931. The cubic root of 20790819 is about 274.9733042956.

It can be divided in two parts, 20790 and 819, that added together give a square (21609 = 147²).

The spelling of 20790819 in words is "twenty million, seven hundred ninety thousand, eight hundred nineteen".