20956793 has 16 divisors (see below), whose sum is σ = 24881472. Its totient is φ = 17400000.

The previous prime is 20956787. The next prime is 20956799. The reversal of 20956793 is 39765902.

It is an interprime number because it is at equal distance from previous prime (20956787) and next prime (20956799).

It is a cyclic number.

It is not a de Polignac number, because 20956793 - 2⁴ = 20956777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20956793.

It is not an unprimeable number, because it can be changed into a prime (20956799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13718 + ... + 15168.

It is an arithmetic number, because the mean of its divisors is an integer number (1555092).

Almost surely, 2^20956793 is an apocalyptic number.

It is an amenable number.

20956793 is a deficient number, since it is larger than the sum of its proper divisors (3924679).

20956793 is a wasteful number, since it uses less digits than its factorization.

20956793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 20956793 is about 4577.8589973917. The cubic root of 20956793 is about 275.7030736950.

It can be divided in two parts, 2095 and 6793, that added together give a palindrome (8888).

The spelling of 20956793 in words is "twenty million, nine hundred fifty-six thousand, seven hundred ninety-three".