20041221193 has 16 divisors (see below), whose sum is σ = 23473304064. Its totient is φ = 16751773440.

The previous prime is 20041221121. The next prime is 20041221209. The reversal of 20041221193 is 39112214002.

It is not a de Polignac number, because 20041221193 - 2³³ = 11451286601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20041231193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688021 + ... + 716557.

It is an arithmetic number, because the mean of its divisors is an integer number (1467081504).

Almost surely, 2^20041221193 is an apocalyptic number.

It is an amenable number.

20041221193 is a deficient number, since it is larger than the sum of its proper divisors (3432082871).

20041221193 is a wasteful number, since it uses less digits than its factorization.

20041221193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31032.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 20041221193 its reverse (39112214002), we get a palindrome (59153435195).

The spelling of 20041221193 in words is "twenty billion, forty-one million, two hundred twenty-one thousand, one hundred ninety-three".