21870205072022 has 8 divisors (see below), whose sum is σ = 32805582481056. Its totient is φ = 10935010911672.

The previous prime is 21870205072013. The next prime is 21870205072043. The reversal of 21870205072022 is 22027050207812.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45513413 + ... + 45991424.

It is an arithmetic number, because the mean of its divisors is an integer number (4100697810132).

Almost surely, 2^{21870205072022} is an apocalyptic number.

21870205072022 is a deficient number, since it is larger than the sum of its proper divisors (10935377409034).

21870205072022 is a wasteful number, since it uses less digits than its factorization.

21870205072022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91624342.

The product of its (nonzero) digits is 62720, while the sum is 38.

Adding to 21870205072022 its reverse (22027050207812), we get a palindrome (43897255279834).

The spelling of 21870205072022 in words is "twenty-one trillion, eight hundred seventy billion, two hundred five million, seventy-two thousand, twenty-two".