20837802819 has 16 divisors (see below), whose sum is σ = 29527454880. Its totient is φ = 13026086400.

The previous prime is 20837802809. The next prime is 20837802871. The reversal of 20837802819 is 91820873802.

It is not a de Polignac number, because 20837802819 - 2¹⁷ = 20837671747 is a prime.

It is a super-2 number, since 2×20837802819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20837802809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745732 + ... + 773169.

It is an arithmetic number, because the mean of its divisors is an integer number (1845465930).

Almost surely, 2^20837802819 is an apocalyptic number.

20837802819 is a deficient number, since it is larger than the sum of its proper divisors (8689652061).

20837802819 is a wasteful number, since it uses less digits than its factorization.

20837802819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519190.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 20837802819 in words is "twenty billion, eight hundred thirty-seven million, eight hundred two thousand, eight hundred nineteen".