20432121107 has 16 divisors (see below), whose sum is σ = 21378494592. Its totient is φ = 19511256960.

The previous prime is 20432121089. The next prime is 20432121113. The reversal of 20432121107 is 70112123402.

It is a cyclic number.

It is not a de Polignac number, because 20432121107 - 2²⁶ = 20365012243 is a prime.

It is a super-2 number, since 2×20432121107² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20432121407) by changing a digit.

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, 428213 + ... + 473529.

It is an arithmetic number, because the mean of its divisors is an integer number (1336155912).

Almost surely, 2^20432121107 is an apocalyptic number.

20432121107 is a deficient number, since it is larger than the sum of its proper divisors (946373485).

20432121107 is a wasteful number, since it uses less digits than its factorization.

20432121107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45598.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 20432121107 its reverse (70112123402), we get a palindrome (90544244509).

The spelling of 20432121107 in words is "twenty billion, four hundred thirty-two million, one hundred twenty-one thousand, one hundred seven".