20343241423021 has 16 divisors (see below), whose sum is σ = 22909914021888. Its totient is φ = 17896189359600.

The previous prime is 20343241422947. The next prime is 20343241423027. The reversal of 20343241423021 is 12032414234302.

It is a cyclic number.

It is not a de Polignac number, because 20343241423021 - 2²¹ = 20343239325869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343241423027) 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, 3812836 + ... + 7431298.

It is an arithmetic number, because the mean of its divisors is an integer number (1431869626368).

Almost surely, 2^{20343241423021} is an apocalyptic number.

It is an amenable number.

20343241423021 is a deficient number, since it is larger than the sum of its proper divisors (2566672598867).

20343241423021 is a wasteful number, since it uses less digits than its factorization.

20343241423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634992.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 20343241423021 its reverse (12032414234302), we get a palindrome (32375655657323).

The spelling of 20343241423021 in words is "twenty trillion, three hundred forty-three billion, two hundred forty-one million, four hundred twenty-three thousand, twenty-one".