20352631421551 has 8 divisors (see below), whose sum is σ = 23910783768144. Its totient is φ = 17079131262720.

The previous prime is 20352631421501. The next prime is 20352631421557. The reversal of 20352631421551 is 15512413625302.

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 20352631421551 - 2³⁵ = 20318271683183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20352631421557) 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, 71163046786 + ... + 71163047071.

It is an arithmetic number, because the mean of its divisors is an integer number (2988847971018).

Almost surely, 2^{20352631421551} is an apocalyptic number.

20352631421551 is a deficient number, since it is larger than the sum of its proper divisors (3558152346593).

20352631421551 is a wasteful number, since it uses less digits than its factorization.

20352631421551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142326093881.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 20352631421551 in words is "twenty trillion, three hundred fifty-two billion, six hundred thirty-one million, four hundred twenty-one thousand, five hundred fifty-one".