928191000020 has 12 divisors (see below), whose sum is σ = 1949201100084. Its totient is φ = 371276400000.

The previous prime is 928190999969. The next prime is 928191000029. The reversal of 928191000020 is 20000191829.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 318064416784 + 610126583236 = 563972^2 + 781106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (928191000029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23204774981 + ... + 23204775020.

It is an arithmetic number, because the mean of its divisors is an integer number (162433425007).

Almost surely, 2^928191000020 is an apocalyptic number.

It is an amenable number.

928191000020 is an abundant number, since it is smaller than the sum of its proper divisors (1021010100064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

928191000020 is a wasteful number, since it uses less digits than its factorization.

928191000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46409550010 (or 46409550008 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

Adding to 928191000020 its reverse (20000191829), we get a palindrome (948191191849).

The spelling of 928191000020 in words is "nine hundred twenty-eight billion, one hundred ninety-one million, twenty", and thus it is an aban number.