20395621354 has 8 divisors (see below), whose sum is σ = 30703878468. Its totient is φ = 10160995200.

The previous prime is 20395621349. The next prime is 20395621357. The reversal of 20395621354 is 45312659302.

It can be written as a sum of positive squares in 2 ways, for example, as 19705140625 + 690480729 = 140375^2 + 26277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20395621357) 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, 18407047 + ... + 18408154.

Almost surely, 2^20395621354 is an apocalyptic number.

20395621354 is a deficient number, since it is larger than the sum of its proper divisors (10308257114).

20395621354 is a wasteful number, since it uses less digits than its factorization.

20395621354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36815480.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 20395621354 in words is "twenty billion, three hundred ninety-five million, six hundred twenty-one thousand, three hundred fifty-four".