20044522251551 has 16 divisors (see below), whose sum is σ = 22945231825920. Its totient is φ = 17153116424640.

The previous prime is 20044522251503. The next prime is 20044522251577. The reversal of 20044522251551 is 15515222544002.

It is not a de Polignac number, because 20044522251551 - 2⁶ = 20044522251487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044522251851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135647315 + ... + 135795003.

It is an arithmetic number, because the mean of its divisors is an integer number (1434076989120).

Almost surely, 2^{20044522251551} is an apocalyptic number.

20044522251551 is a deficient number, since it is larger than the sum of its proper divisors (2900709574369).

20044522251551 is a wasteful number, since it uses less digits than its factorization.

20044522251551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179054.

The product of its (nonzero) digits is 160000, while the sum is 38.

Adding to 20044522251551 its reverse (15515222544002), we get a palindrome (35559744795553).

The spelling of 20044522251551 in words is "twenty trillion, forty-four billion, five hundred twenty-two million, two hundred fifty-one thousand, five hundred fifty-one".