20551042254 has 16 divisors (see below), whose sum is σ = 41134746240. Its totient is φ = 6844903800.

The previous prime is 20551042163. The next prime is 20551042279. The reversal of 20551042254 is 45224015502.

It is a congruent number.

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, 1352722 + ... + 1367829.

It is an arithmetic number, because the mean of its divisors is an integer number (2570921640).

Almost surely, 2^20551042254 is an apocalyptic number.

20551042254 is an abundant number, since it is smaller than the sum of its proper divisors (20583703986).

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

20551042254 is a wasteful number, since it uses less digits than its factorization.

20551042254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721815.

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 20551042254 its reverse (45224015502), we get a palindrome (65775057756).

The spelling of 20551042254 in words is "twenty billion, five hundred fifty-one million, forty-two thousand, two hundred fifty-four".