20340442101 has 16 divisors (see below), whose sum is σ = 30999888000. Its totient is φ = 11621261568.

The previous prime is 20340442093. The next prime is 20340442121. The reversal of 20340442101 is 10124404302.

It is not a de Polignac number, because 20340442101 - 2³ = 20340442093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340442121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64225 + ... + 211673.

It is an arithmetic number, because the mean of its divisors is an integer number (1937493000).

Almost surely, 2^20340442101 is an apocalyptic number.

20340442101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20340442101 is a deficient number, since it is larger than the sum of its proper divisors (10659445899).

20340442101 is a wasteful number, since it uses less digits than its factorization.

20340442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154028.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20340442101 its reverse (10124404302), we get a palindrome (30464846403).

The spelling of 20340442101 in words is "twenty billion, three hundred forty million, four hundred forty-two thousand, one hundred one".