20124077 has 4 divisors (see below), whose sum is σ = 20136096. Its totient is φ = 20112060.

The previous prime is 20124031. The next prime is 20124079. The reversal of 20124077 is 77042102.

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: 77042102 = 2 ⋅38521051.

It is a cyclic number.

It is not a de Polignac number, because 20124077 - 2¹⁴ = 20107693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124079) 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, 2993 + ... + 7014.

It is an arithmetic number, because the mean of its divisors is an integer number (5034024).

Almost surely, 2^20124077 is an apocalyptic number.

It is an amenable number.

20124077 is a deficient number, since it is larger than the sum of its proper divisors (12019).

20124077 is a wasteful number, since it uses less digits than its factorization.

20124077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12018.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20124077 is about 4485.9867364940. The cubic root of 20124077 is about 272.0019328366.

Adding to 20124077 its reverse (77042102), we get a palindrome (97166179).

The spelling of 20124077 in words is "twenty million, one hundred twenty-four thousand, seventy-seven".