20544304551 has 24 divisors (see below), whose sum is σ = 29284042320. Its totient is φ = 12808353792.

The previous prime is 20544304493. The next prime is 20544304567. The reversal of 20544304551 is 15540344502.

It is not a de Polignac number, because 20544304551 - 2³¹ = 18396820903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544304951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60655 + ... + 211583.

It is an arithmetic number, because the mean of its divisors is an integer number (1220168430).

Almost surely, 2^20544304551 is an apocalyptic number.

20544304551 is a deficient number, since it is larger than the sum of its proper divisors (8739737769).

20544304551 is a wasteful number, since it uses less digits than its factorization.

20544304551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151123 (or 151106 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 20544304551 in words is "twenty billion, five hundred forty-four million, three hundred four thousand, five hundred fifty-one".