20638275837 has 8 divisors (see below), whose sum is σ = 27577916736. Its totient is φ = 13728742752.

The previous prime is 20638275767. The next prime is 20638275839. The reversal of 20638275837 is 73857283602.

It is a happy number.

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

It is not a de Polignac number, because 20638275837 - 2⁷ = 20638275709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20638275837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20638275839) 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, 7525353 + ... + 7528094.

It is an arithmetic number, because the mean of its divisors is an integer number (3447239592).

Almost surely, 2^20638275837 is an apocalyptic number.

It is an amenable number.

20638275837 is a deficient number, since it is larger than the sum of its proper divisors (6939640899).

20638275837 is a wasteful number, since it uses less digits than its factorization.

20638275837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15053907.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 20638275837 in words is "twenty billion, six hundred thirty-eight million, two hundred seventy-five thousand, eight hundred thirty-seven".