20767394 has 4 divisors (see below), whose sum is σ = 31151094. Its totient is φ = 10383696.

The previous prime is 20767339. The next prime is 20767423. The reversal of 20767394 is 49376702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49376702 = 2 ⋅24688351.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 4566769 = 4025^2 + 2137^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5191847 + ... + 5191850.

Almost surely, 2^20767394 is an apocalyptic number.

20767394 is a deficient number, since it is larger than the sum of its proper divisors (10383700).

20767394 is a wasteful number, since it uses less digits than its factorization.

20767394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10383699.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 20767394 is about 4557.1256291658. The cubic root of 20767394 is about 274.8699947485.

The spelling of 20767394 in words is "twenty million, seven hundred sixty-seven thousand, three hundred ninety-four".