20103291851 has 2 divisors, whose sum is σ = 20103291852. Its totient is φ = 20103291850.

The previous prime is 20103291823. The next prime is 20103291883. The reversal of 20103291851 is 15819230102.

It is a happy number.

It is an a-pointer prime, because the next prime (20103291883) can be obtained adding 20103291851 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20103291851 - 2²⁶ = 20036182987 is a prime.

It is not a weakly prime, because it can be changed into another prime (20103291251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051645925 + 10051645926.

It is an arithmetic number, because the mean of its divisors is an integer number (10051645926).

Almost surely, 2^20103291851 is an apocalyptic number.

20103291851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103291851 is an equidigital number, since it uses as much as digits as its factorization.

20103291851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 20103291851 in words is "twenty billion, one hundred three million, two hundred ninety-one thousand, eight hundred fifty-one".