20129862433 has 4 divisors (see below), whose sum is σ = 20314540180. Its totient is φ = 19945184688.

The previous prime is 20129862427. The next prime is 20129862439. The reversal of 20129862433 is 33426892102.

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 (20129862427) and next prime (20129862439).

It can be written as a sum of positive squares in 2 ways, for example, as 6377140449 + 13752721984 = 79857^2 + 117272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20129862433 is a prime.

It is a super-2 number, since 2×20129862433² (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 (20129862439) 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, 92338710 + ... + 92338927.

It is an arithmetic number, because the mean of its divisors is an integer number (5078635045).

Almost surely, 2^20129862433 is an apocalyptic number.

It is an amenable number.

20129862433 is a deficient number, since it is larger than the sum of its proper divisors (184677747).

20129862433 is a wasteful number, since it uses less digits than its factorization.

20129862433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184677746.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 20129862433 in words is "twenty billion, one hundred twenty-nine million, eight hundred sixty-two thousand, four hundred thirty-three".