20636384251444 has 48 divisors (see below), whose sum is σ = 38907967347648. Its totient is φ = 9520489363968.

The previous prime is 20636384251387. The next prime is 20636384251477. The reversal of 20636384251444 is 44415248363602.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 20636384251391 and 20636384251400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2258546844 + ... + 2258555980.

It is an arithmetic number, because the mean of its divisors is an integer number (810582653076).

Almost surely, 2^{20636384251444} is an apocalyptic number.

It is an amenable number.

20636384251444 is a deficient number, since it is larger than the sum of its proper divisors (18271583096204).

20636384251444 is a wasteful number, since it uses less digits than its factorization.

20636384251444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22624 (or 22622 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 52.

The spelling of 20636384251444 in words is "twenty trillion, six hundred thirty-six billion, three hundred eighty-four million, two hundred fifty-one thousand, four hundred forty-four".