21052612337 has 16 divisors (see below), whose sum is σ = 23039396352. Its totient is φ = 19150613760.

The previous prime is 21052612331. The next prime is 21052612369. The reversal of 21052612337 is 73321625012.

It is a cyclic number.

It is not a de Polignac number, because 21052612337 - 2¹⁰ = 21052611313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21052612331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394958 + ... + 445080.

It is an arithmetic number, because the mean of its divisors is an integer number (1439962272).

Almost surely, 2^21052612337 is an apocalyptic number.

It is an amenable number.

21052612337 is a deficient number, since it is larger than the sum of its proper divisors (1986784015).

21052612337 is a wasteful number, since it uses less digits than its factorization.

21052612337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50968.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 21052612337 in words is "twenty-one billion, fifty-two million, six hundred twelve thousand, three hundred thirty-seven".