20701438 has 4 divisors (see below), whose sum is σ = 31052160. Its totient is φ = 10350718.

The previous prime is 20701423. The next prime is 20701441. The reversal of 20701438 is 83410702.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5175358 + ... + 5175361.

It is an arithmetic number, because the mean of its divisors is an integer number (7763040).

Almost surely, 2^20701438 is an apocalyptic number.

20701438 is a deficient number, since it is larger than the sum of its proper divisors (10350722).

20701438 is a wasteful number, since it uses less digits than its factorization.

20701438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10350721.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20701438 is about 4549.8832952066. The cubic root of 20701438 is about 274.5786959324.

The spelling of 20701438 in words is "twenty million, seven hundred one thousand, four hundred thirty-eight".