20210464421 has 8 divisors (see below), whose sum is σ = 23414080704. Its totient is φ = 17085949920.

The previous prime is 20210464409. The next prime is 20210464447. The reversal of 20210464421 is 12446401202.

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-20210464421 is a prime.

It is a super-2 number, since 2×20210464421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210464451) 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 7 ways as a sum of consecutive naturals, for example, 19774895 + ... + 19775916.

It is an arithmetic number, because the mean of its divisors is an integer number (2926760088).

Almost surely, 2^20210464421 is an apocalyptic number.

It is an amenable number.

20210464421 is a deficient number, since it is larger than the sum of its proper divisors (3203616283).

20210464421 is an equidigital number, since it uses as much as digits as its factorization.

20210464421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39550891.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 20210464421 its reverse (12446401202), we get a palindrome (32656865623).

The spelling of 20210464421 in words is "twenty billion, two hundred ten million, four hundred sixty-four thousand, four hundred twenty-one".