20823474229 has 4 divisors (see below), whose sum is σ = 21007752876. Its totient is φ = 20639195584.

The previous prime is 20823474211. The next prime is 20823474247. The reversal of 20823474229 is 92247432802.

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

It is an interprime number because it is at equal distance from previous prime (20823474211) and next prime (20823474247).

It can be written as a sum of positive squares in 2 ways, for example, as 5694966225 + 15128508004 = 75465^2 + 122998^2 .

It is a cyclic number.

It is not a de Polignac number, because 20823474229 - 2⁵ = 20823474197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20823414229) 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, 92139154 + ... + 92139379.

It is an arithmetic number, because the mean of its divisors is an integer number (5251938219).

Almost surely, 2^20823474229 is an apocalyptic number.

It is an amenable number.

20823474229 is a deficient number, since it is larger than the sum of its proper divisors (184278647).

20823474229 is a wasteful number, since it uses less digits than its factorization.

20823474229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184278646.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 20823474229 in words is "twenty billion, eight hundred twenty-three million, four hundred seventy-four thousand, two hundred twenty-nine".