20347061 has 4 divisors (see below), whose sum is σ = 23253792. Its totient is φ = 17440332.

The previous prime is 20347037. The next prime is 20347069. The reversal of 20347061 is 16074302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16074302 = 2 ⋅8037151.

It is not a de Polignac number, because 20347061 - 2¹⁴ = 20330677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20347069) 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, 1453355 + ... + 1453368.

It is an arithmetic number, because the mean of its divisors is an integer number (5813448).

Almost surely, 2^20347061 is an apocalyptic number.

It is an amenable number.

20347061 is a deficient number, since it is larger than the sum of its proper divisors (2906731).

20347061 is an equidigital number, since it uses as much as digits as its factorization.

20347061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906730.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20347061 is about 4510.7716634740. The cubic root of 20347061 is about 273.0028802802.

The spelling of 20347061 in words is "twenty million, three hundred forty-seven thousand, sixty-one".