20442121004 has 6 divisors (see below), whose sum is σ = 35773711764. Its totient is φ = 10221060500.

The previous prime is 20442121003. The next prime is 20442121027. The reversal of 20442121004 is 40012124402.

It is a super-2 number, since 2×20442121004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20442121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555265122 + ... + 2555265129.

It is an arithmetic number, because the mean of its divisors is an integer number (5962285294).

Almost surely, 2^20442121004 is an apocalyptic number.

It is an amenable number.

20442121004 is a deficient number, since it is larger than the sum of its proper divisors (15331590760).

20442121004 is a wasteful number, since it uses less digits than its factorization.

20442121004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110530255 (or 5110530253 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20442121004 its reverse (40012124402), we get a palindrome (60454245406).

The spelling of 20442121004 in words is "twenty billion, four hundred forty-two million, one hundred twenty-one thousand, four".