21232002020346 has 64 divisors (see below), whose sum is σ = 50848965095040. Its totient is φ = 6528123313920.

The previous prime is 21232002020269. The next prime is 21232002020347. The reversal of 21232002020346 is 64302020023212.

It is a happy number.

21232002020346 is a `hidden beast` number, since 212 + 3 + 200 + 2 + 0 + 203 + 46 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21232002020347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10155900 + ... + 12066743.

It is an arithmetic number, because the mean of its divisors is an integer number (794515079610).

Almost surely, 2^{21232002020346} is an apocalyptic number.

21232002020346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21232002020346 is an abundant number, since it is smaller than the sum of its proper divisors (29616963074694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232002020346 is a wasteful number, since it uses less digits than its factorization.

21232002020346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22224028 (or 22224022 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21232002020346 its reverse (64302020023212), we get a palindrome (85534022043558).

The spelling of 21232002020346 in words is "twenty-one trillion, two hundred thirty-two billion, two million, twenty thousand, three hundred forty-six".