21302732738 has 8 divisors (see below), whose sum is σ = 36518970432. Its totient is φ = 9129742596.

The previous prime is 21302732729. The next prime is 21302732771. The reversal of 21302732738 is 83723720312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760811870 + ... + 760811897.

It is an arithmetic number, because the mean of its divisors is an integer number (4564871304).

Almost surely, 2^21302732738 is an apocalyptic number.

21302732738 is a deficient number, since it is larger than the sum of its proper divisors (15216237694).

21302732738 is a wasteful number, since it uses less digits than its factorization.

21302732738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521623776.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 21302732738 in words is "twenty-one billion, three hundred two million, seven hundred thirty-two thousand, seven hundred thirty-eight".