100020531492 has 288 divisors, whose sum is σ = 310477999104. Its totient is φ = 26500608000.

The previous prime is 100020531449. The next prime is 100020531547. The reversal of 100020531492 is 294135020001.

100020531492 is a `hidden beast` number, since 100 + 0 + 20 + 53 + 1 + 492 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 117256938 + ... + 117257790.

It is an arithmetic number, because the mean of its divisors is an integer number (1078048608).

Almost surely, 2^100020531492 is an apocalyptic number.

100020531492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100020531492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155238999552).

100020531492 is an abundant number, since it is smaller than the sum of its proper divisors (210457467612).

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

100020531492 is a wasteful number, since it uses less digits than its factorization.

100020531492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1254 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 100020531492 its reverse (294135020001), we get a palindrome (394155551493).

The spelling of 100020531492 in words is "one hundred billion, twenty million, five hundred thirty-one thousand, four hundred ninety-two".