20154516740551 has 4 divisors (see below), whose sum is σ = 20173693256104. Its totient is φ = 20135340225000.

The previous prime is 20154516740483. The next prime is 20154516740557. The reversal of 20154516740551 is 15504761545102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20154516740551 - 2¹³ = 20154516732359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154516740557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9588256200 + ... + 9588258301.

It is an arithmetic number, because the mean of its divisors is an integer number (5043423314026).

Almost surely, 2^{20154516740551} is an apocalyptic number.

20154516740551 is a deficient number, since it is larger than the sum of its proper divisors (19176515553).

20154516740551 is a wasteful number, since it uses less digits than its factorization.

20154516740551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19176515552.

The product of its (nonzero) digits is 840000, while the sum is 46.

The spelling of 20154516740551 in words is "twenty trillion, one hundred fifty-four billion, five hundred sixteen million, seven hundred forty thousand, five hundred fifty-one".