20551211254 has 64 divisors (see below), whose sum is σ = 36771840000. Its totient is φ = 8431112448.

The previous prime is 20551211251. The next prime is 20551211273. The reversal of 20551211254 is 45211215502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551211251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10279747 + ... + 10281745.

It is an arithmetic number, because the mean of its divisors is an integer number (574560000).

Almost surely, 2^20551211254 is an apocalyptic number.

20551211254 is a deficient number, since it is larger than the sum of its proper divisors (16220628746).

20551211254 is a wasteful number, since it uses less digits than its factorization.

20551211254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 20551211254 its reverse (45211215502), we get a palindrome (65762426756).

The spelling of 20551211254 in words is "twenty billion, five hundred fifty-one million, two hundred eleven thousand, two hundred fifty-four".