20812443619 has 16 divisors (see below), whose sum is σ = 24455890944. Its totient is φ = 17513971200.

The previous prime is 20812443607. The next prime is 20812443623. The reversal of 20812443619 is 91634421802.

It is not a de Polignac number, because 20812443619 - 2³³ = 12222509027 is a prime.

It is a super-2 number, since 2×20812443619² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20812443689) 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, 1318974 + ... + 1334659.

It is an arithmetic number, because the mean of its divisors is an integer number (1528493184).

Almost surely, 2^20812443619 is an apocalyptic number.

20812443619 is a deficient number, since it is larger than the sum of its proper divisors (3643447325).

20812443619 is a wasteful number, since it uses less digits than its factorization.

20812443619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653698.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 20812443619 in words is "twenty billion, eight hundred twelve million, four hundred forty-three thousand, six hundred nineteen".