20613893507 has 8 divisors (see below), whose sum is σ = 21827847600. Its totient is φ = 19400091904.

The previous prime is 20613893491. The next prime is 20613893537. The reversal of 20613893507 is 70539831602.

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 20613893507 - 2⁴ = 20613893491 is a prime.

It is a super-3 number, since 3×20613893507³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20613893537) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 357719 + ... + 411327.

It is an arithmetic number, because the mean of its divisors is an integer number (2728480950).

Almost surely, 2^20613893507 is an apocalyptic number.

20613893507 is a deficient number, since it is larger than the sum of its proper divisors (1213954093).

20613893507 is a wasteful number, since it uses less digits than its factorization.

20613893507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76245.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 20613893507 in words is "twenty billion, six hundred thirteen million, eight hundred ninety-three thousand, five hundred seven".