19870028770 has 16 divisors (see below), whose sum is σ = 36919795968. Its totient is φ = 7691623920.

The previous prime is 19870028767. The next prime is 19870028777. The reversal of 19870028770 is 7782007891.

It is not an unprimeable number, because it can be changed into a prime (19870028777) 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, 32048124 + ... + 32048743.

It is an arithmetic number, because the mean of its divisors is an integer number (2307487248).

Almost surely, 2^19870028770 is an apocalyptic number.

19870028770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19870028770 is a deficient number, since it is larger than the sum of its proper divisors (17049767198).

19870028770 is a wasteful number, since it uses less digits than its factorization.

19870028770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64096905.

The product of its (nonzero) digits is 395136, while the sum is 49.

The spelling of 19870028770 in words is "nineteen billion, eight hundred seventy million, twenty-eight thousand, seven hundred seventy".