20427128390 has 8 divisors (see below), whose sum is σ = 36768831120. Its totient is φ = 8170851352.

The previous prime is 20427128389. The next prime is 20427128453. The reversal of 20427128390 is 9382172402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021356410 + ... + 1021356429.

It is an arithmetic number, because the mean of its divisors is an integer number (4596103890).

Almost surely, 2^20427128390 is an apocalyptic number.

20427128390 is a deficient number, since it is larger than the sum of its proper divisors (16341702730).

20427128390 is a wasteful number, since it uses less digits than its factorization.

20427128390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042712846.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 20427128390 in words is "twenty billion, four hundred twenty-seven million, one hundred twenty-eight thousand, three hundred ninety".