21052295427 has 8 divisors (see below), whose sum is σ = 28071630864. Its totient is φ = 14033911808.

The previous prime is 21052295399. The next prime is 21052295441. The reversal of 21052295427 is 72459225012.

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

It is a cyclic number.

It is not a de Polignac number, because 21052295427 - 2¹⁴ = 21052279043 is a prime.

It is a super-2 number, since 2×21052295427² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21052295447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184638 + ... + 276035.

It is an arithmetic number, because the mean of its divisors is an integer number (3508953858).

Almost surely, 2^21052295427 is an apocalyptic number.

21052295427 is a deficient number, since it is larger than the sum of its proper divisors (7019335437).

21052295427 is a wasteful number, since it uses less digits than its factorization.

21052295427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475909.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 21052295427 in words is "twenty-one billion, fifty-two million, two hundred ninety-five thousand, four hundred twenty-seven".