29947257613 has 16 divisors (see below), whose sum is σ = 39026292480. Its totient is φ = 22300736256.

The previous prime is 29947257563. The next prime is 29947257629. The reversal of 29947257613 is 31675274992.

It is a cyclic number.

It is not a de Polignac number, because 29947257613 - 2¹³ = 29947249421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29947257673) 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, 9677593 + ... + 9680686.

It is an arithmetic number, because the mean of its divisors is an integer number (2439143280).

Almost surely, 2^29947257613 is an apocalyptic number.

It is an amenable number.

29947257613 is a deficient number, since it is larger than the sum of its proper divisors (9079034867).

29947257613 is a wasteful number, since it uses less digits than its factorization.

29947257613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19358316.

The product of its digits is 5715360, while the sum is 55.

The spelling of 29947257613 in words is "twenty-nine billion, nine hundred forty-seven million, two hundred fifty-seven thousand, six hundred thirteen".