20154516428 has 24 divisors (see below), whose sum is σ = 35366913792. Its totient is φ = 10049714064.

The previous prime is 20154516377. The next prime is 20154516433. The reversal of 20154516428 is 82461545102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20154516391 and 20154516400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4055201 + ... + 4060167.

It is an arithmetic number, because the mean of its divisors is an integer number (1473621408).

Almost surely, 2^20154516428 is an apocalyptic number.

It is an amenable number.

20154516428 is a deficient number, since it is larger than the sum of its proper divisors (15212397364).

20154516428 is a wasteful number, since it uses less digits than its factorization.

20154516428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7541 (or 7539 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The spelling of 20154516428 in words is "twenty billion, one hundred fifty-four million, five hundred sixteen thousand, four hundred twenty-eight".