21702602145 has 32 divisors (see below), whose sum is σ = 40277081088. Its totient is φ = 9773108928.

The previous prime is 21702602113. The next prime is 21702602147. The reversal of 21702602145 is 54120620712.

It is not a de Polignac number, because 21702602145 - 2⁵ = 21702602113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21702602147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1535439 + ... + 1549508.

It is an arithmetic number, because the mean of its divisors is an integer number (1258658784).

Almost surely, 2^21702602145 is an apocalyptic number.

It is an amenable number.

21702602145 is a deficient number, since it is larger than the sum of its proper divisors (18574478943).

21702602145 is a wasteful number, since it uses less digits than its factorization.

21702602145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085029.

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 21702602145 in words is "twenty-one billion, seven hundred two million, six hundred two thousand, one hundred forty-five".