20738348989 has 4 divisors (see below), whose sum is σ = 20786466240. Its totient is φ = 20690231740.

The previous prime is 20738348971. The next prime is 20738348993. The reversal of 20738348989 is 98984383702.

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 20738348989 - 2⁵ = 20738348957 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 (20738348089) 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, 24057979 + ... + 24058840.

It is an arithmetic number, because the mean of its divisors is an integer number (5196616560).

Almost surely, 2^20738348989 is an apocalyptic number.

It is an amenable number.

20738348989 is a deficient number, since it is larger than the sum of its proper divisors (48117251).

20738348989 is an equidigital number, since it uses as much as digits as its factorization.

20738348989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48117250.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 20738348989 in words is "twenty billion, seven hundred thirty-eight million, three hundred forty-eight thousand, nine hundred eighty-nine".