20331212294 has 16 divisors (see below), whose sum is σ = 31585237200. Its totient is φ = 9803617824.

The previous prime is 20331212269. The next prime is 20331212311. The reversal of 20331212294 is 49221213302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154217 + ... + 253860.

It is an arithmetic number, because the mean of its divisors is an integer number (1974077325).

Almost surely, 2^20331212294 is an apocalyptic number.

20331212294 is a deficient number, since it is larger than the sum of its proper divisors (11254024906).

20331212294 is a wasteful number, since it uses less digits than its factorization.

20331212294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408967.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 20331212294 its reverse (49221213302), we get a palindrome (69552425596).

The spelling of 20331212294 in words is "twenty billion, three hundred thirty-one million, two hundred twelve thousand, two hundred ninety-four".