20542054551 has 8 divisors (see below), whose sum is σ = 28272935424. Its totient is φ = 13252938360.

The previous prime is 20542054529. The next prime is 20542054583. The reversal of 20542054551 is 15545024502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20542054551 - 2¹⁵ = 20542021783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542054051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110441061 + ... + 110441246.

It is an arithmetic number, because the mean of its divisors is an integer number (3534116928).

Almost surely, 2^20542054551 is an apocalyptic number.

20542054551 is a deficient number, since it is larger than the sum of its proper divisors (7730880873).

20542054551 is a wasteful number, since it uses less digits than its factorization.

20542054551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220882341.

The product of its (nonzero) digits is 40000, while the sum is 33.

The spelling of 20542054551 in words is "twenty billion, five hundred forty-two million, fifty-four thousand, five hundred fifty-one".