20396253956 has 48 divisors (see below), whose sum is σ = 39703792128. Its totient is φ = 9104313600.

The previous prime is 20396253869. The next prime is 20396253971. The reversal of 20396253956 is 65935269302.

It is a happy number.

It is a super-3 number, since 3×20396253956³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3612896 + ... + 3618536.

It is an arithmetic number, because the mean of its divisors is an integer number (827162336).

Almost surely, 2^20396253956 is an apocalyptic number.

20396253956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20396253956 is a deficient number, since it is larger than the sum of its proper divisors (19307538172).

20396253956 is a wasteful number, since it uses less digits than its factorization.

20396253956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932 (or 7930 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 50.

The spelling of 20396253956 in words is "twenty billion, three hundred ninety-six million, two hundred fifty-three thousand, nine hundred fifty-six".