21013115010 has 32 divisors (see below), whose sum is σ = 50877780480. Its totient is φ = 5553907968.

The previous prime is 21013115003. The next prime is 21013115033. The reversal of 21013115010 is 1051131012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3095890 + ... + 3102669.

It is an arithmetic number, because the mean of its divisors is an integer number (1589930640).

Almost surely, 2^21013115010 is an apocalyptic number.

21013115010 is an abundant number, since it is smaller than the sum of its proper divisors (29864665470).

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

21013115010 is a wasteful number, since it uses less digits than its factorization.

21013115010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198682.

The product of its (nonzero) digits is 30, while the sum is 15.

Adding to 21013115010 its reverse (1051131012), we get a palindrome (22064246022).

The spelling of 21013115010 in words is "twenty-one billion, thirteen million, one hundred fifteen thousand, ten".