20425205551154 has 16 divisors (see below), whose sum is σ = 31049259678360. Its totient is φ = 10075950149760.

The previous prime is 20425205551133. The next prime is 20425205551181. The reversal of 20425205551154 is 45115550252402.

It can be written as a sum of positive squares in 4 ways, for example, as 6566524125529 + 13858681425625 = 2562523^2 + 3722725^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124373849 + ... + 124537964.

Almost surely, 2^{20425205551154} is an apocalyptic number.

20425205551154 is a deficient number, since it is larger than the sum of its proper divisors (10624054127206).

20425205551154 is a wasteful number, since it uses less digits than its factorization.

20425205551154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248912365.

The product of its (nonzero) digits is 400000, while the sum is 41.

The spelling of 20425205551154 in words is "twenty trillion, four hundred twenty-five billion, two hundred five million, five hundred fifty-one thousand, one hundred fifty-four".