20000022020021 has 8 divisors (see below), whose sum is σ = 20012989586688. Its totient is φ = 19987057030000.

The previous prime is 20000022020003. The next prime is 20000022020029. The reversal of 20000022020021 is 12002022000002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000022020021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000022019984 and 20000022020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000022020029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15008036 + ... + 16286226.

It is an arithmetic number, because the mean of its divisors is an integer number (2501623698336).

Almost surely, 2^{20000022020021} is an apocalyptic number.

It is an amenable number.

20000022020021 is a deficient number, since it is larger than the sum of its proper divisors (12967566667).

20000022020021 is a wasteful number, since it uses less digits than its factorization.

20000022020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288323.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20000022020021 its reverse (12002022000002), we get a palindrome (32002044020023).

The spelling of 20000022020021 in words is "twenty trillion, twenty-two million, twenty thousand, twenty-one".