20251015102 has 4 divisors (see below), whose sum is σ = 30376522656. Its totient is φ = 10125507550.

The previous prime is 20251015073. The next prime is 20251015117. The reversal of 20251015102 is 20151015202.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20251015102² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20251015102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5062753774 + ... + 5062753777.

It is an arithmetic number, because the mean of its divisors is an integer number (7594130664).

Almost surely, 2^20251015102 is an apocalyptic number.

20251015102 is a deficient number, since it is larger than the sum of its proper divisors (10125507554).

20251015102 is a wasteful number, since it uses less digits than its factorization.

20251015102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125507553.

The product of its (nonzero) digits is 200, while the sum is 19.

The spelling of 20251015102 in words is "twenty billion, two hundred fifty-one million, fifteen thousand, one hundred two".