20155454120 has 32 divisors (see below), whose sum is σ = 45355026600. Its totient is φ = 8061247488.

The previous prime is 20155454119. The next prime is 20155454129. The reversal of 20155454120 is 2145455102.

It can be written as a sum of positive squares in 4 ways, for example, as 18681969124 + 1473484996 = 136682^2 + 38386^2 .

It is not an unprimeable number, because it can be changed into a prime (20155454129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397232 + ... + 445088.

Almost surely, 2^20155454120 is an apocalyptic number.

20155454120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20155454120 is an abundant number, since it is smaller than the sum of its proper divisors (25199572480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20155454120 is a wasteful number, since it uses less digits than its factorization.

20155454120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58397 (or 58393 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 20155454120 in words is "twenty billion, one hundred fifty-five million, four hundred fifty-four thousand, one hundred twenty".