20838722 has 4 divisors (see below), whose sum is σ = 31258086. Its totient is φ = 10419360.

The previous prime is 20838721. The next prime is 20838751. The reversal of 20838722 is 22783802.

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

It can be written as a sum of positive squares in only one way, i.e., 19971961 + 866761 = 4469^2 + 931^2 .

It is not an unprimeable number, because it can be changed into a prime (20838721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5209679 + ... + 5209682.

Almost surely, 2^20838722 is an apocalyptic number.

20838722 is a deficient number, since it is larger than the sum of its proper divisors (10419364).

20838722 is a wasteful number, since it uses less digits than its factorization.

20838722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419363.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20838722 is about 4564.9449065679. The cubic root of 20838722 is about 275.1843260098.

The spelling of 20838722 in words is "twenty million, eight hundred thirty-eight thousand, seven hundred twenty-two".