21203531030 has 32 divisors (see below), whose sum is σ = 41642028288. Its totient is φ = 7709263200.

The previous prime is 21203531021. The next prime is 21203531053. The reversal of 21203531030 is 3013530212.

It is a junction number, because it is equal to n+sod(n) for n = 21203530993 and 21203531011.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1454759 + ... + 1469261.

It is an arithmetic number, because the mean of its divisors is an integer number (1301313384).

Almost surely, 2^21203531030 is an apocalyptic number.

21203531030 is a deficient number, since it is larger than the sum of its proper divisors (20438497258).

21203531030 is a wasteful number, since it uses less digits than its factorization.

21203531030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27812.

The product of its (nonzero) digits is 540, while the sum is 20.

The spelling of 21203531030 in words is "twenty-one billion, two hundred three million, five hundred thirty-one thousand, thirty".