20629716349 has 4 divisors (see below), whose sum is σ = 22505145120. Its totient is φ = 18754287580.

The previous prime is 20629716329. The next prime is 20629716361. The reversal of 20629716349 is 94361792602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20629716349 - 2²¹ = 20627619197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20629716329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937714369 + ... + 937714390.

It is an arithmetic number, because the mean of its divisors is an integer number (5626286280).

Almost surely, 2^20629716349 is an apocalyptic number.

It is an amenable number.

20629716349 is a deficient number, since it is larger than the sum of its proper divisors (1875428771).

20629716349 is a wasteful number, since it uses less digits than its factorization.

20629716349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875428770.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 20629716349 in words is "twenty billion, six hundred twenty-nine million, seven hundred sixteen thousand, three hundred forty-nine".