20342204402421 has 8 divisors (see below), whose sum is σ = 29588660949024. Its totient is φ = 12328608728720.

The previous prime is 20342204402393. The next prime is 20342204402437. The reversal of 20342204402421 is 12420440224302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20342204402421 - 2¹¹ = 20342204400373 is a prime.

It is a super-2 number, since 2×20342204402421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342204402021) 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, 308215218186 + ... + 308215218251.

It is an arithmetic number, because the mean of its divisors is an integer number (3698582618628).

Almost surely, 2^{20342204402421} is an apocalyptic number.

It is an amenable number.

20342204402421 is a deficient number, since it is larger than the sum of its proper divisors (9246456546603).

20342204402421 is a wasteful number, since it uses less digits than its factorization.

20342204402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616430436451.

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 20342204402421 its reverse (12420440224302), we get a palindrome (32762644626723).

The spelling of 20342204402421 in words is "twenty trillion, three hundred forty-two billion, two hundred four million, four hundred two thousand, four hundred twenty-one".