1994226993 has 64 divisors (see below), whose sum is σ = 3349463040. Its totient is φ = 1161734400.

The previous prime is 1994226961. The next prime is 1994227009. The reversal of 1994226993 is 3996224991.

It is not a de Polignac number, because 1994226993 - 2⁵ = 1994226961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1994226943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1536921 + ... + 1538217.

It is an arithmetic number, because the mean of its divisors is an integer number (52335360).

Almost surely, 2^1994226993 is an apocalyptic number.

It is an amenable number.

1994226993 is a deficient number, since it is larger than the sum of its proper divisors (1355236047).

1994226993 is a wasteful number, since it uses less digits than its factorization.

1994226993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1509 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 1994226993 is about 44656.7687254687. The cubic root of 1994226993 is about 1258.7076261208.

The spelling of 1994226993 in words is "one billion, nine hundred ninety-four million, two hundred twenty-six thousand, nine hundred ninety-three".