20741397 has 4 divisors (see below), whose sum is σ = 27655200. Its totient is φ = 13827596.

The previous prime is 20741393. The next prime is 20741401. The reversal of 20741397 is 79314702.

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 an interprime number because it is at equal distance from previous prime (20741393) and next prime (20741401).

It is a cyclic number.

It is not a de Polignac number, because 20741397 - 2² = 20741393 is a prime.

It is a super-3 number, since 3×20741397³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20741393) 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, 3456897 + ... + 3456902.

It is an arithmetic number, because the mean of its divisors is an integer number (6913800).

Almost surely, 2^20741397 is an apocalyptic number.

It is an amenable number.

20741397 is a deficient number, since it is larger than the sum of its proper divisors (6913803).

20741397 is an equidigital number, since it uses as much as digits as its factorization.

20741397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913802.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 20741397 is about 4554.2723897457. The cubic root of 20741397 is about 274.7552511096.

The spelling of 20741397 in words is "twenty million, seven hundred forty-one thousand, three hundred ninety-seven".