20379581641 has 24 divisors (see below), whose sum is σ = 21558930624. Its totient is φ = 19261962720.

The previous prime is 20379581627. The next prime is 20379581653. The reversal of 20379581641 is 14618597302.

20379581641 = 99² + 100² + ... + 3939².

It is not a de Polignac number, because 20379581641 - 2⁵ = 20379581609 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20379581591 and 20379581600.

It is not an unprimeable number, because it can be changed into a prime (20379581671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17402986 + ... + 17404156.

It is an arithmetic number, because the mean of its divisors is an integer number (898288776).

It is a 2-persistent number, because it is pandigital, and so is 2⋅20379581641 = 40759163282, but 3⋅20379581641 = 61138744923 is not.

Almost surely, 2^20379581641 is an apocalyptic number.

20379581641 is the 90288-th centered pentagonal number.

It is an amenable number.

20379581641 is a deficient number, since it is larger than the sum of its proper divisors (1179348983).

20379581641 is a wasteful number, since it uses less digits than its factorization.

20379581641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1558 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 20379581641 in words is "twenty billion, three hundred seventy-nine million, five hundred eighty-one thousand, six hundred forty-one".