20619607399 has 4 divisors (see below), whose sum is σ = 20619909520. Its totient is φ = 20619305280.

The previous prime is 20619607381. The next prime is 20619607447. The reversal of 20619607399 is 99370691602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20619607399 - 2²⁷ = 20485389671 is a prime.

It is a super-3 number, since 3×20619607399³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20619607339) 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, 5182 + ... + 203140.

It is an arithmetic number, because the mean of its divisors is an integer number (5154977380).

Almost surely, 2^20619607399 is an apocalyptic number.

20619607399 is a deficient number, since it is larger than the sum of its proper divisors (302121).

20619607399 is a wasteful number, since it uses less digits than its factorization.

20619607399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302120.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 20619607399 in words is "twenty billion, six hundred nineteen million, six hundred seven thousand, three hundred ninety-nine".