20342003021 has 8 divisors (see below), whose sum is σ = 21554372160. Its totient is φ = 19131387328.

The previous prime is 20342003009. The next prime is 20342003027. The reversal of 20342003021 is 12030024302.

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 20342003021 - 2⁶ = 20342002957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342003027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414431 + ... + 460908.

It is an arithmetic number, because the mean of its divisors is an integer number (2694296520).

Almost surely, 2^20342003021 is an apocalyptic number.

It is an amenable number.

20342003021 is a deficient number, since it is larger than the sum of its proper divisors (1212369139).

20342003021 is a wasteful number, since it uses less digits than its factorization.

20342003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876723.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20342003021 its reverse (12030024302), we get a palindrome (32372027323).

The spelling of 20342003021 in words is "twenty billion, three hundred forty-two million, three thousand, twenty-one".