21203013030 has 64 divisors (see below), whose sum is σ = 51581629440. Its totient is φ = 5577122304.

The previous prime is 21203013017. The next prime is 21203013067. The reversal of 21203013030 is 3031030212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2809422 + ... + 2816958.

It is an arithmetic number, because the mean of its divisors is an integer number (805962960).

Almost surely, 2^21203013030 is an apocalyptic number.

21203013030 is an abundant number, since it is smaller than the sum of its proper divisors (30378616410).

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

21203013030 is a wasteful number, since it uses less digits than its factorization.

21203013030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8813.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21203013030 its reverse (3031030212), we get a palindrome (24234043242).

The spelling of 21203013030 in words is "twenty-one billion, two hundred three million, thirteen thousand, thirty".