21020153422 has 8 divisors (see below), whose sum is σ = 32901109776. Its totient is φ = 10053116832.

The previous prime is 21020153327. The next prime is 21020153423. The reversal of 21020153422 is 22435102012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21020153393 and 21020153402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020153423) 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 3 ways as a sum of consecutive naturals, for example, 228479883 + ... + 228479974.

It is an arithmetic number, because the mean of its divisors is an integer number (4112638722).

Almost surely, 2^21020153422 is an apocalyptic number.

21020153422 is a deficient number, since it is larger than the sum of its proper divisors (11880956354).

21020153422 is a wasteful number, since it uses less digits than its factorization.

21020153422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456959882.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21020153422 its reverse (22435102012), we get a palindrome (43455255434).

The spelling of 21020153422 in words is "twenty-one billion, twenty million, one hundred fifty-three thousand, four hundred twenty-two".