2120741906 has 4 divisors (see below), whose sum is σ = 3181112862. Its totient is φ = 1060370952.

The previous prime is 2120741879. The next prime is 2120741941. The reversal of 2120741906 is 6091470212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1955850625 + 164891281 = 44225^2 + 12841^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530185475 + ... + 530185478.

Almost surely, 2^2120741906 is an apocalyptic number.

2120741906 is a deficient number, since it is larger than the sum of its proper divisors (1060370956).

2120741906 is a wasteful number, since it uses less digits than its factorization.

2120741906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060370955.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2120741906 is about 46051.5136124753. The cubic root of 2120741906 is about 1284.7814949417.

The spelling of 2120741906 in words is "two billion, one hundred twenty million, seven hundred forty-one thousand, nine hundred six".