21142033422 has 32 divisors (see below), whose sum is σ = 42469608960. Its totient is φ = 7016484960.

The previous prime is 21142033403. The next prime is 21142033427. The reversal of 21142033422 is 22433024112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21142033392 and 21142033401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142033427) 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, 1399047 + ... + 1414077.

It is an arithmetic number, because the mean of its divisors is an integer number (1327175280).

Almost surely, 2^21142033422 is an apocalyptic number.

21142033422 is an abundant number, since it is smaller than the sum of its proper divisors (21327575538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142033422 is a wasteful number, since it uses less digits than its factorization.

21142033422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16048.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21142033422 its reverse (22433024112), we get a palindrome (43575057534).

The spelling of 21142033422 in words is "twenty-one billion, one hundred forty-two million, thirty-three thousand, four hundred twenty-two".