2120187492 has 72 divisors (see below), whose sum is σ = 5458635000. Its totient is φ = 693688320.

The previous prime is 2120187469. The next prime is 2120187493. The reversal of 2120187492 is 2947810212.

It can be written as a sum of positive squares in 4 ways, for example, as 101123136 + 2019064356 = 10056^2 + 44934^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2120187493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1696884 + ... + 1698132.

It is an arithmetic number, because the mean of its divisors is an integer number (75814375).

Almost surely, 2^2120187492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120187492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2729317500).

2120187492 is an abundant number, since it is smaller than the sum of its proper divisors (3338447508).

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

2120187492 is a wasteful number, since it uses less digits than its factorization.

2120187492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2120187492 is about 46045.4937208843. The cubic root of 2120187492 is about 1284.6695273758.

The spelling of 2120187492 in words is "two billion, one hundred twenty million, one hundred eighty-seven thousand, four hundred ninety-two".