20002001421 has 32 divisors (see below), whose sum is σ = 27764052480. Its totient is φ = 12797858304.

The previous prime is 20002001417. The next prime is 20002001563. The reversal of 20002001421 is 12410020002.

It is not a de Polignac number, because 20002001421 - 2² = 20002001417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002001397 and 20002001406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002001021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4571791 + ... + 4576163.

It is an arithmetic number, because the mean of its divisors is an integer number (867626640).

Almost surely, 2^20002001421 is an apocalyptic number.

It is an amenable number.

20002001421 is a deficient number, since it is larger than the sum of its proper divisors (7762051059).

20002001421 is a wasteful number, since it uses less digits than its factorization.

20002001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20002001421 its reverse (12410020002), we get a palindrome (32412021423).

The spelling of 20002001421 in words is "twenty billion, two million, one thousand, four hundred twenty-one".