20002723399 has 4 divisors (see below), whose sum is σ = 20104260264. Its totient is φ = 19901186536.

The previous prime is 20002723387. The next prime is 20002723409. The reversal of 20002723399 is 99332720002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20002723399 - 2¹³ = 20002715207 is a prime.

It is a super-2 number, since 2×20002723399² (a number of 21 digits) contains 22 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 (20002723319) 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, 50768137 + ... + 50768530.

It is an arithmetic number, because the mean of its divisors is an integer number (5026065066).

Almost surely, 2^20002723399 is an apocalyptic number.

20002723399 is a deficient number, since it is larger than the sum of its proper divisors (101536865).

20002723399 is a wasteful number, since it uses less digits than its factorization.

20002723399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101536864.

The product of its (nonzero) digits is 40824, while the sum is 37.

The spelling of 20002723399 in words is "twenty billion, two million, seven hundred twenty-three thousand, three hundred ninety-nine".