20215352451 has 16 divisors (see below), whose sum is σ = 31866566400. Its totient is φ = 11153297568.

The previous prime is 20215352401. The next prime is 20215352453. The reversal of 20215352451 is 15425351202.

It is not a de Polignac number, because 20215352451 - 2⁶ = 20215352387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20215352453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16596561 + ... + 16597778.

It is an arithmetic number, because the mean of its divisors is an integer number (1991660400).

Almost surely, 2^20215352451 is an apocalyptic number.

20215352451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20215352451 is a deficient number, since it is larger than the sum of its proper divisors (11651213949).

20215352451 is a wasteful number, since it uses less digits than its factorization.

20215352451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33194378.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20215352451 in words is "twenty billion, two hundred fifteen million, three hundred fifty-two thousand, four hundred fifty-one".