20152444555 has 16 divisors (see below), whose sum is σ = 25614610560. Its totient is φ = 15168182272.

The previous prime is 20152444471. The next prime is 20152444573. The reversal of 20152444555 is 55544425102.

It is not a de Polignac number, because 20152444555 - 2⁹ = 20152444043 is a prime.

It is a super-2 number, since 2×20152444555² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205326 + ... + 287164.

It is an arithmetic number, because the mean of its divisors is an integer number (1600913160).

Almost surely, 2^20152444555 is an apocalyptic number.

20152444555 is a deficient number, since it is larger than the sum of its proper divisors (5462166005).

20152444555 is a wasteful number, since it uses less digits than its factorization.

20152444555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84758.

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 20152444555 its reverse (55544425102), we get a palindrome (75696869657).

The spelling of 20152444555 in words is "twenty billion, one hundred fifty-two million, four hundred forty-four thousand, five hundred fifty-five".