20737340929 has 4 divisors (see below), whose sum is σ = 20746052820. Its totient is φ = 20728629040.

The previous prime is 20737340903. The next prime is 20737340957. The reversal of 20737340929 is 92904373702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8198940304 + 12538400625 = 90548^2 + 111975^2 .

It is a cyclic number.

It is not a de Polignac number, because 20737340929 - 2⁷ = 20737340801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20737340969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4352374 + ... + 4357135.

It is an arithmetic number, because the mean of its divisors is an integer number (5186513205).

Almost surely, 2^20737340929 is an apocalyptic number.

It is an amenable number.

20737340929 is a deficient number, since it is larger than the sum of its proper divisors (8711891).

20737340929 is an equidigital number, since it uses as much as digits as its factorization.

20737340929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711890.

The product of its (nonzero) digits is 571536, while the sum is 46.

The spelling of 20737340929 in words is "twenty billion, seven hundred thirty-seven million, three hundred forty thousand, nine hundred twenty-nine".