21002803070 has 16 divisors (see below), whose sum is σ = 37914000048. Its totient is φ = 8376909120.

The previous prime is 21002803057. The next prime is 21002803079. The reversal of 21002803070 is 7030820012.

It is a super-2 number, since 2×21002803070² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002803079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3022871 + ... + 3029810.

It is an arithmetic number, because the mean of its divisors is an integer number (2369625003).

Almost surely, 2^21002803070 is an apocalyptic number.

21002803070 is a deficient number, since it is larger than the sum of its proper divisors (16911196978).

21002803070 is a wasteful number, since it uses less digits than its factorization.

21002803070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6053035.

The product of its (nonzero) digits is 672, while the sum is 23.

The spelling of 21002803070 in words is "twenty-one billion, two million, eight hundred three thousand, seventy".