20129502003 has 16 divisors (see below), whose sum is σ = 28906456320. Its totient is φ = 12386290464.

The previous prime is 20129501999. The next prime is 20129502007. The reversal of 20129502003 is 30020592102.

It is an interprime number because it is at equal distance from previous prime (20129501999) and next prime (20129502007).

It is not a de Polignac number, because 20129502003 - 2² = 20129501999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20129502007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 793368 + ... + 818346.

It is an arithmetic number, because the mean of its divisors is an integer number (1806653520).

Almost surely, 2^20129502003 is an apocalyptic number.

20129502003 is a deficient number, since it is larger than the sum of its proper divisors (8776954317).

20129502003 is a wasteful number, since it uses less digits than its factorization.

20129502003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45658.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 20129502003 in words is "twenty billion, one hundred twenty-nine million, five hundred two thousand, three".