20047124 has 6 divisors (see below), whose sum is σ = 35082474. Its totient is φ = 10023560.

The previous prime is 20047123. The next prime is 20047127. The reversal of 20047124 is 42174002.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 84100 = 4468^2 + 290^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20047096 and 20047105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2505887 + ... + 2505894.

It is an arithmetic number, because the mean of its divisors is an integer number (5847079).

Almost surely, 2^20047124 is an apocalyptic number.

It is an amenable number.

20047124 is a deficient number, since it is larger than the sum of its proper divisors (15035350).

20047124 is a wasteful number, since it uses less digits than its factorization.

20047124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011785 (or 5011783 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20047124 is about 4477.4014785364. The cubic root of 20047124 is about 271.6547847982.

It can be divided in two parts, 2004 and 7124, that multiplied together give a triangular number (14276496 = T₅₃₄₃).

The spelling of 20047124 in words is "twenty million, forty-seven thousand, one hundred twenty-four".