20394015988 has 12 divisors (see below), whose sum is σ = 36119522880. Its totient is φ = 10074152312.

The previous prime is 20394015919. The next prime is 20394015989. The reversal of 20394015988 is 88951049302.

It is a super-2 number, since 2×20394015988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20394015989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30713548 + ... + 30714211.

It is an arithmetic number, because the mean of its divisors is an integer number (3009960240).

Almost surely, 2^20394015988 is an apocalyptic number.

It is an amenable number.

20394015988 is a deficient number, since it is larger than the sum of its proper divisors (15725506892).

20394015988 is a wasteful number, since it uses less digits than its factorization.

20394015988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61427846 (or 61427844 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 20394015988 in words is "twenty billion, three hundred ninety-four million, fifteen thousand, nine hundred eighty-eight".