21270537152 has 28 divisors (see below), whose sum is σ = 42372991200. Its totient is φ = 10593878016.

The previous prime is 21270537143. The next prime is 21270537199. The reversal of 21270537152 is 25173507212.

It is a super-2 number, since 2×21270537152² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 630152 + ... + 663047.

Almost surely, 2^21270537152 is an apocalyptic number.

It is an amenable number.

21270537152 is a deficient number, since it is larger than the sum of its proper divisors (21102454048).

21270537152 is a wasteful number, since it uses less digits than its factorization.

21270537152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293468 (or 1293458 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 21270537152 in words is "twenty-one billion, two hundred seventy million, five hundred thirty-seven thousand, one hundred fifty-two".