20215466251 has 8 divisors (see below), whose sum is σ = 20364402240. Its totient is φ = 20066580552.

The previous prime is 20215466209. The next prime is 20215466287. The reversal of 20215466251 is 15266451202.

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 20215466251 - 2¹⁹ = 20214941963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20215466351) 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, 1271316 + ... + 1287118.

It is an arithmetic number, because the mean of its divisors is an integer number (2545550280).

Almost surely, 2^20215466251 is an apocalyptic number.

20215466251 is a deficient number, since it is larger than the sum of its proper divisors (148935989).

20215466251 is a wasteful number, since it uses less digits than its factorization.

20215466251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25145.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 20215466251 in words is "twenty billion, two hundred fifteen million, four hundred sixty-six thousand, two hundred fifty-one".