21293147762 has 8 divisors (see below), whose sum is σ = 32079197100. Its totient is φ = 10600082064.

The previous prime is 21293147699. The next prime is 21293147789. The reversal of 21293147762 is 26774139212.

It can be written as a sum of positive squares in 2 ways, for example, as 21117611761 + 175536001 = 145319^2 + 13249^2 .

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

It is a super-2 number, since 2×21293147762² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23245337 + ... + 23246252.

Almost surely, 2^21293147762 is an apocalyptic number.

21293147762 is a deficient number, since it is larger than the sum of its proper divisors (10786049338).

21293147762 is a wasteful number, since it uses less digits than its factorization.

21293147762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46491820.

The product of its digits is 254016, while the sum is 44.

The spelling of 21293147762 in words is "twenty-one billion, two hundred ninety-three million, one hundred forty-seven thousand, seven hundred sixty-two".