21023302010 has 16 divisors (see below), whose sum is σ = 37850917896. Its totient is φ = 8407326528.

The previous prime is 21023301979. The next prime is 21023302121. The reversal of 21023302010 is 1020332012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18171848809 + 2851453201 = 134803^2 + 53399^2 .

It is a super-3 number, since 3×21023302010³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204629 + ... + 289688.

Almost surely, 2^21023302010 is an apocalyptic number.

21023302010 is a deficient number, since it is larger than the sum of its proper divisors (16827615886).

21023302010 is a wasteful number, since it uses less digits than its factorization.

21023302010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498577.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21023302010 its reverse (1020332012), we get a palindrome (22043634022).

The spelling of 21023302010 in words is "twenty-one billion, twenty-three million, three hundred two thousand, ten".