20442341451 has 16 divisors (see below), whose sum is σ = 31155784704. Its totient is φ = 11679256704.

The previous prime is 20442341449. The next prime is 20442341461. The reversal of 20442341451 is 15414324402.

It is not a de Polignac number, because 20442341451 - 2¹ = 20442341449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20442341461) 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, 38131 + ... + 205763.

It is an arithmetic number, because the mean of its divisors is an integer number (1947236544).

Almost surely, 2^20442341451 is an apocalyptic number.

20442341451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20442341451 is a deficient number, since it is larger than the sum of its proper divisors (10713443253).

20442341451 is a wasteful number, since it uses less digits than its factorization.

20442341451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173450.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 20442341451 its reverse (15414324402), we get a palindrome (35856665853).

The spelling of 20442341451 in words is "twenty billion, four hundred forty-two million, three hundred forty-one thousand, four hundred fifty-one".