20154423554 has 4 divisors (see below), whose sum is σ = 30231635334. Its totient is φ = 10077211776.

The previous prime is 20154423539. The next prime is 20154423571. The reversal of 20154423554 is 45532445102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12337211329 + 7817212225 = 111073^2 + 88415^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038605887 + ... + 5038605890.

Almost surely, 2^20154423554 is an apocalyptic number.

20154423554 is a deficient number, since it is larger than the sum of its proper divisors (10077211780).

20154423554 is a wasteful number, since it uses less digits than its factorization.

20154423554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077211779.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 20154423554 its reverse (45532445102), we get a palindrome (65686868656).

The spelling of 20154423554 in words is "twenty billion, one hundred fifty-four million, four hundred twenty-three thousand, five hundred fifty-four".