20347461 has 24 divisors (see below), whose sum is σ = 31125120. Its totient is φ = 12773376.

The previous prime is 20347427. The next prime is 20347463. The reversal of 20347461 is 16474302.

It is not a de Polignac number, because 20347461 - 2¹⁰ = 20346437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20347463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43716 + ... + 44178.

It is an arithmetic number, because the mean of its divisors is an integer number (1296880).

Almost surely, 2^20347461 is an apocalyptic number.

It is an amenable number.

20347461 is a deficient number, since it is larger than the sum of its proper divisors (10777659).

20347461 is a wasteful number, since it uses less digits than its factorization.

20347461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20347461 is about 4510.8160015678. The cubic root of 20347461 is about 273.0046692435.

The spelling of 20347461 in words is "twenty million, three hundred forty-seven thousand, four hundred sixty-one".