20331001394 has 16 divisors (see below), whose sum is σ = 33765464736. Its totient is φ = 9103432800.

The previous prime is 20331001387. The next prime is 20331001399. The reversal of 20331001394 is 49310013302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20331001399) by changing a digit.

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, 6895067 + ... + 6898014.

It is an arithmetic number, because the mean of its divisors is an integer number (2110341546).

Almost surely, 2^20331001394 is an apocalyptic number.

20331001394 is a deficient number, since it is larger than the sum of its proper divisors (13434463342).

20331001394 is a wasteful number, since it uses less digits than its factorization.

20331001394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13793161.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 20331001394 its reverse (49310013302), we get a palindrome (69641014696).

The spelling of 20331001394 in words is "twenty billion, three hundred thirty-one million, one thousand, three hundred ninety-four".