10202001994 has 4 divisors (see below), whose sum is σ = 15303002994. Its totient is φ = 5101000996.

The previous prime is 10202001973. The next prime is 10202002001. The reversal of 10202001994 is 49910020201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49910020201 = 71 ⋅702958031.

It can be written as a sum of positive squares in only one way, i.e., 10041042025 + 160959969 = 100205^2 + 12687^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550500497 + ... + 2550500500.

Almost surely, 2^10202001994 is an apocalyptic number.

10202001994 is a deficient number, since it is larger than the sum of its proper divisors (5101001000).

10202001994 is an equidigital number, since it uses as much as digits as its factorization.

10202001994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101000999.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 10202001994 in words is "ten billion, two hundred two million, one thousand, nine hundred ninety-four".