20013122554 has 4 divisors (see below), whose sum is σ = 30019683834. Its totient is φ = 10006561276.

The previous prime is 20013122543. The next prime is 20013122609. The reversal of 20013122554 is 45522131002.

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., 19876770225 + 136352329 = 140985^2 + 11677^2 .

It is a super-2 number, since 2×20013122554² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003280637 + ... + 5003280640.

Almost surely, 2^20013122554 is an apocalyptic number.

20013122554 is a deficient number, since it is larger than the sum of its proper divisors (10006561280).

20013122554 is a wasteful number, since it uses less digits than its factorization.

20013122554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006561279.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20013122554 its reverse (45522131002), we get a palindrome (65535253556).

The spelling of 20013122554 in words is "twenty billion, thirteen million, one hundred twenty-two thousand, five hundred fifty-four".