20612156613 has 8 divisors (see below), whose sum is σ = 27487822176. Its totient is φ = 13738964400.

The previous prime is 20612156569. The next prime is 20612156693. The reversal of 20612156613 is 31665121602.

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

It is not a de Polignac number, because 20612156613 - 2⁹ = 20612156101 is a prime.

It is a super-2 number, since 2×20612156613² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612156693) 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, 598803 + ... + 632288.

It is an arithmetic number, because the mean of its divisors is an integer number (3435977772).

Almost surely, 2^20612156613 is an apocalyptic number.

It is an amenable number.

20612156613 is a deficient number, since it is larger than the sum of its proper divisors (6875665563).

20612156613 is a wasteful number, since it uses less digits than its factorization.

20612156613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236675.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 20612156613 in words is "twenty billion, six hundred twelve million, one hundred fifty-six thousand, six hundred thirteen".