20021445210355 has 16 divisors (see below), whose sum is σ = 24582274994304. Its totient is φ = 15647388865920.

The previous prime is 20021445210311. The next prime is 20021445210367. The reversal of 20021445210355 is 55301254412002.

It is a happy number.

It is not a de Polignac number, because 20021445210355 - 2²⁵ = 20021411655923 is a prime.

It is a super-2 number, since 2×20021445210355² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021445210355.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78613752 + ... + 78868021.

It is an arithmetic number, because the mean of its divisors is an integer number (1536392187144).

Almost surely, 2^{20021445210355} is an apocalyptic number.

20021445210355 is a deficient number, since it is larger than the sum of its proper divisors (4560829783949).

20021445210355 is a wasteful number, since it uses less digits than its factorization.

20021445210355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157482366.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 20021445210355 its reverse (55301254412002), we get a palindrome (75322699622357).

The spelling of 20021445210355 in words is "twenty trillion, twenty-one billion, four hundred forty-five million, two hundred ten thousand, three hundred fifty-five".