20428515049401 has 24 divisors (see below), whose sum is σ = 29795326311296. Its totient is φ = 13486339762560.

The previous prime is 20428515049363. The next prime is 20428515049417. The reversal of 20428515049401 is 10494051582402.

20428515049401 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 8 + 5 + 150 + 494 + 0 + 1 = 666.

It is not a de Polignac number, because 20428515049401 - 2⁷ = 20428515049273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20428515069401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28891041 + ... + 29589681.

Almost surely, 2^{20428515049401} is an apocalyptic number.

It is an amenable number.

20428515049401 is a deficient number, since it is larger than the sum of its proper divisors (9366811261895).

20428515049401 is a wasteful number, since it uses less digits than its factorization.

20428515049401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730293 (or 730290 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 20428515049401 in words is "twenty trillion, four hundred twenty-eight billion, five hundred fifteen million, forty-nine thousand, four hundred one".