20340041421 has 32 divisors (see below), whose sum is σ = 32356067328. Its totient is φ = 11112678720.

The previous prime is 20340041363. The next prime is 20340041437. The reversal of 20340041421 is 12414004302.

It is not a de Polignac number, because 20340041421 - 2¹³ = 20340033229 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 (20340041461) 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 31 ways as a sum of consecutive naturals, for example, 1285126 + ... + 1300856.

It is an arithmetic number, because the mean of its divisors is an integer number (1011127104).

Almost surely, 2^20340041421 is an apocalyptic number.

20340041421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20340041421 is a deficient number, since it is larger than the sum of its proper divisors (12016025907).

20340041421 is a wasteful number, since it uses less digits than its factorization.

20340041421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18441.

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

Adding to 20340041421 its reverse (12414004302), we get a palindrome (32754045723).

The spelling of 20340041421 in words is "twenty billion, three hundred forty million, forty-one thousand, four hundred twenty-one".