20451148591839 has 32 divisors (see below), whose sum is σ = 31266518400000. Its totient is φ = 11647830307584.

The previous prime is 20451148591831. The next prime is 20451148591859. The reversal of 20451148591839 is 93819584115402.

It is not a de Polignac number, because 20451148591839 - 2³ = 20451148591831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451148591831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13997587 + ... + 15389435.

It is an arithmetic number, because the mean of its divisors is an integer number (977078700000).

Almost surely, 2^{20451148591839} is an apocalyptic number.

20451148591839 is a deficient number, since it is larger than the sum of its proper divisors (10815369808161).

20451148591839 is a wasteful number, since it uses less digits than its factorization.

20451148591839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394167.

The product of its (nonzero) digits is 12441600, while the sum is 60.

The spelling of 20451148591839 in words is "twenty trillion, four hundred fifty-one billion, one hundred forty-eight million, five hundred ninety-one thousand, eight hundred thirty-nine".