20154752728 has 32 divisors (see below), whose sum is σ = 41256034560. Its totient is φ = 9154494880.

The previous prime is 20154752699. The next prime is 20154752729. The reversal of 20154752728 is 82725745102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154752729) 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, 36525 + ... + 204067.

It is an arithmetic number, because the mean of its divisors is an integer number (1289251080).

Almost surely, 2^20154752728 is an apocalyptic number.

It is an amenable number.

20154752728 is an abundant number, since it is smaller than the sum of its proper divisors (21101281832).

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

20154752728 is a wasteful number, since it uses less digits than its factorization.

20154752728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168927 (or 168923 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

The spelling of 20154752728 in words is "twenty billion, one hundred fifty-four million, seven hundred fifty-two thousand, seven hundred twenty-eight".