20553444021519 has 12 divisors (see below), whose sum is σ = 29688347387400. Its totient is φ = 13702277849904.

The previous prime is 20553444021503. The next prime is 20553444021557. The reversal of 20553444021519 is 91512044435502.

20553444021519 is a `hidden beast` number, since 2 + 0 + 5 + 53 + 4 + 440 + 2 + 151 + 9 = 666.

It is not a de Polignac number, because 20553444021519 - 2⁴ = 20553444021503 is a prime.

It is a super-2 number, since 2×20553444021519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553444025519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12039177 + ... + 13639965.

It is an arithmetic number, because the mean of its divisors is an integer number (2474028948950).

Almost surely, 2^{20553444021519} is an apocalyptic number.

20553444021519 is a deficient number, since it is larger than the sum of its proper divisors (9134903365881).

20553444021519 is a wasteful number, since it uses less digits than its factorization.

20553444021519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027414 (or 3027411 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 20553444021519 in words is "twenty trillion, five hundred fifty-three billion, four hundred forty-four million, twenty-one thousand, five hundred nineteen".