20154552560 has 20 divisors (see below), whose sum is σ = 46859334888. Its totient is φ = 8061820992.

The previous prime is 20154552557. The next prime is 20154552563. The reversal of 20154552560 is 6525545102.

It is an interprime number because it is at equal distance from previous prime (20154552557) and next prime (20154552563).

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 20154552560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154552563) 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, 125965874 + ... + 125966033.

Almost surely, 2^20154552560 is an apocalyptic number.

20154552560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154552560 is an abundant number, since it is smaller than the sum of its proper divisors (26704782328).

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

20154552560 is a wasteful number, since it uses less digits than its factorization.

20154552560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251931920 (or 251931914 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 20154552560 in words is "twenty billion, one hundred fifty-four million, five hundred fifty-two thousand, five hundred sixty".