20205229994 has 4 divisors (see below), whose sum is σ = 30307844994. Its totient is φ = 10102614996.

The previous prime is 20205229991. The next prime is 20205230009. The reversal of 20205229994 is 49992250202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49992250202 = 2 ⋅24996125101.

It can be written as a sum of positive squares in only one way, i.e., 20082574369 + 122655625 = 141713^2 + 11075^2 .

It is a super-2 number, since 2×20205229994² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20205229991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051307497 + ... + 5051307500.

Almost surely, 2^20205229994 is an apocalyptic number.

20205229994 is a deficient number, since it is larger than the sum of its proper divisors (10102615000).

20205229994 is a wasteful number, since it uses less digits than its factorization.

20205229994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102614999.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 20205229994 in words is "twenty billion, two hundred five million, two hundred twenty-nine thousand, nine hundred ninety-four".