2113651994 has 4 divisors (see below), whose sum is σ = 3170477994. Its totient is φ = 1056825996.

The previous prime is 2113651987. The next prime is 2113652003. The reversal of 2113651994 is 4991563112.

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., 1698511369 + 415140625 = 41213^2 + 20375^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528412997 + ... + 528413000.

Almost surely, 2^2113651994 is an apocalyptic number.

2113651994 is a deficient number, since it is larger than the sum of its proper divisors (1056826000).

2113651994 is a wasteful number, since it uses less digits than its factorization.

2113651994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056825999.

The product of its digits is 58320, while the sum is 41.

The square root of 2113651994 is about 45974.4711116942. The cubic root of 2113651994 is about 1283.3481667520.

The spelling of 2113651994 in words is "two billion, one hundred thirteen million, six hundred fifty-one thousand, nine hundred ninety-four".