20331494358987 has 64 divisors (see below), whose sum is σ = 35333299077120. Its totient is φ = 10118171718144.

The previous prime is 20331494358913. The next prime is 20331494359019. The reversal of 20331494358987 is 78985349413302.

It is not a de Polignac number, because 20331494358987 - 2⁷ = 20331494358859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20331494358907) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34562043 + ... + 35145380.

It is an arithmetic number, because the mean of its divisors is an integer number (552082798080).

Almost surely, 2^{20331494358987} is an apocalyptic number.

20331494358987 is a deficient number, since it is larger than the sum of its proper divisors (15001804718133).

20331494358987 is a wasteful number, since it uses less digits than its factorization.

20331494358987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69707512.

The product of its (nonzero) digits is 156764160, while the sum is 66.

The spelling of 20331494358987 in words is "twenty trillion, three hundred thirty-one billion, four hundred ninety-four million, three hundred fifty-eight thousand, nine hundred eighty-seven".