19881385428710 has 64 divisors (see below), whose sum is σ = 38572737622272. Its totient is φ = 7334453339136.

The previous prime is 19881385428677. The next prime is 19881385428713. The reversal of 19881385428710 is 1782458318891.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19881385428713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756134324 + ... + 756160616.

It is an arithmetic number, because the mean of its divisors is an integer number (602699025348).

Almost surely, 2^{19881385428710} is an apocalyptic number.

19881385428710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19881385428710 is a deficient number, since it is larger than the sum of its proper divisors (18691352193562).

19881385428710 is a wasteful number, since it uses less digits than its factorization.

19881385428710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31137.

The product of its (nonzero) digits is 30965760, while the sum is 65.

The spelling of 19881385428710 in words is "nineteen trillion, eight hundred eighty-one billion, three hundred eighty-five million, four hundred twenty-eight thousand, seven hundred ten".