20001244235 has 32 divisors (see below), whose sum is σ = 29019264000. Its totient is φ = 12927911040.

The previous prime is 20001244217. The next prime is 20001244259. The reversal of 20001244235 is 53244210002.

It is a happy number.

It is not a de Polignac number, because 20001244235 - 2²² = 19997049931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001244235.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56765 + ... + 207905.

It is an arithmetic number, because the mean of its divisors is an integer number (906852000).

Almost surely, 2^20001244235 is an apocalyptic number.

20001244235 is a deficient number, since it is larger than the sum of its proper divisors (9018019765).

20001244235 is a wasteful number, since it uses less digits than its factorization.

20001244235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151371.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20001244235 its reverse (53244210002), we get a palindrome (73245454237).

The spelling of 20001244235 in words is "twenty billion, one million, two hundred forty-four thousand, two hundred thirty-five".