20100340129 has 4 divisors (see below), whose sum is σ = 20441023920. Its totient is φ = 19759656340.

The previous prime is 20100340111. The next prime is 20100340147. The reversal of 20100340129 is 92104300102.

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.

It is an interprime number because it is at equal distance from previous prime (20100340111) and next prime (20100340147).

It is a cyclic number.

It is not a de Polignac number, because 20100340129 - 2²³ = 20091951521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100340189) 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, 170341807 + ... + 170341924.

It is an arithmetic number, because the mean of its divisors is an integer number (5110255980).

Almost surely, 2^20100340129 is an apocalyptic number.

It is an amenable number.

20100340129 is a deficient number, since it is larger than the sum of its proper divisors (340683791).

20100340129 is an equidigital number, since it uses as much as digits as its factorization.

20100340129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340683790.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 20100340129 in words is "twenty billion, one hundred million, three hundred forty thousand, one hundred twenty-nine".