20347841 has 4 divisors (see below), whose sum is σ = 21418800. Its totient is φ = 19276884.

The previous prime is 20347829. The next prime is 20347843. The reversal of 20347841 is 14874302.

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 20347841 - 2⁶ = 20347777 is a prime.

It is a super-2 number, since 2×20347841² = 828069266722562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20347843) 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, 535451 + ... + 535488.

It is an arithmetic number, because the mean of its divisors is an integer number (5354700).

Almost surely, 2^20347841 is an apocalyptic number.

It is an amenable number.

20347841 is a deficient number, since it is larger than the sum of its proper divisors (1070959).

20347841 is a wasteful number, since it uses less digits than its factorization.

20347841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070958.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20347841 is about 4510.8581223532. The cubic root of 20347841 is about 273.0063687369.

The spelling of 20347841 in words is "twenty million, three hundred forty-seven thousand, eight hundred forty-one".