20902308029 has 4 divisors (see below), whose sum is σ = 20996040576. Its totient is φ = 20808575484.

The previous prime is 20902308019. The next prime is 20902308059. The reversal of 20902308029 is 92080320902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92080320902 = 2 ⋅46040160451.

It is a cyclic number.

It is not a de Polignac number, because 20902308029 - 2²⁸ = 20633872573 is a prime.

It is a super-3 number, since 3×20902308029³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20902308029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902308019) 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, 46865939 + ... + 46866384.

It is an arithmetic number, because the mean of its divisors is an integer number (5249010144).

Almost surely, 2^20902308029 is an apocalyptic number.

It is an amenable number.

20902308029 is a deficient number, since it is larger than the sum of its proper divisors (93732547).

20902308029 is an equidigital number, since it uses as much as digits as its factorization.

20902308029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93732546.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 20902308029 in words is "twenty billion, nine hundred two million, three hundred eight thousand, twenty-nine".