21203333020 has 24 divisors (see below), whose sum is σ = 44533183968. Its totient is φ = 8480155200.

The previous prime is 21203333017. The next prime is 21203333023. The reversal of 21203333020 is 2033330212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21203333017) and next prime (21203333023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203333023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81990 + ... + 221650.

It is an arithmetic number, because the mean of its divisors is an integer number (1855549332).

Almost surely, 2^21203333020 is an apocalyptic number.

21203333020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203333020 is an abundant number, since it is smaller than the sum of its proper divisors (23329850948).

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

21203333020 is a wasteful number, since it uses less digits than its factorization.

21203333020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147261 (or 147259 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21203333020 its reverse (2033330212), we get a palindrome (23236663232).

The spelling of 21203333020 in words is "twenty-one billion, two hundred three million, three hundred thirty-three thousand, twenty".