20054155121 has 16 divisors (see below), whose sum is σ = 26925859968. Its totient is φ = 14424566400.

The previous prime is 20054155117. The next prime is 20054155129. The reversal of 20054155121 is 12155145002.

It is a cyclic number.

It is not a de Polignac number, because 20054155121 - 2² = 20054155117 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20054155129) 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, 10016060 + ... + 10018061.

It is an arithmetic number, because the mean of its divisors is an integer number (1682866248).

Almost surely, 2^20054155121 is an apocalyptic number.

It is an amenable number.

20054155121 is a deficient number, since it is larger than the sum of its proper divisors (6871704847).

20054155121 is a wasteful number, since it uses less digits than its factorization.

20054155121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20034152.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 20054155121 in words is "twenty billion, fifty-four million, one hundred fifty-five thousand, one hundred twenty-one".