12045921634 has 4 divisors (see below), whose sum is σ = 18068882454. Its totient is φ = 6022960816.

The previous prime is 12045921631. The next prime is 12045921683. The reversal of 12045921634 is 43612954021.

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., 11749909609 + 296012025 = 108397^2 + 17205^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12045921593 and 12045921602.

It is not an unprimeable number, because it can be changed into a prime (12045921631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3011480407 + ... + 3011480410.

Almost surely, 2^12045921634 is an apocalyptic number.

12045921634 is a deficient number, since it is larger than the sum of its proper divisors (6022960820).

12045921634 is an equidigital number, since it uses as much as digits as its factorization.

12045921634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6022960819.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 12045921634 in words is "twelve billion, forty-five million, nine hundred twenty-one thousand, six hundred thirty-four".