20115250421 has 8 divisors (see below), whose sum is σ = 22999985280. Its totient is φ = 17233297488.

The previous prime is 20115250411. The next prime is 20115250423. The reversal of 20115250421 is 12405251102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20115250421 - 2¹⁰ = 20115249397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115250423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679961 + ... + 708926.

It is an arithmetic number, because the mean of its divisors is an integer number (2874998160).

Almost surely, 2^20115250421 is an apocalyptic number.

It is an amenable number.

20115250421 is a deficient number, since it is larger than the sum of its proper divisors (2884734859).

20115250421 is a wasteful number, since it uses less digits than its factorization.

20115250421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390963.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 20115250421 in words is "twenty billion, one hundred fifteen million, two hundred fifty thousand, four hundred twenty-one".