20713077 has 72 divisors (see below), whose sum is σ = 39678912. Its totient is φ = 10497600.

The previous prime is 20713073. The next prime is 20713079. The reversal of 20713077 is 77031702.

It is not a de Polignac number, because 20713077 - 2² = 20713073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20713077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713073) 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 71 ways as a sum of consecutive naturals, for example, 505177 + ... + 505217.

It is an arithmetic number, because the mean of its divisors is an integer number (551096).

Almost surely, 2^20713077 is an apocalyptic number.

20713077 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20713077 is a deficient number, since it is larger than the sum of its proper divisors (18965835).

20713077 is an frugal number, since it uses more digits than its factorization.

20713077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 20713077 is about 4551.1621592732. The cubic root of 20713077 is about 274.6301452198.

Adding to 20713077 its reverse (77031702), we get a palindrome (97744779).

The spelling of 20713077 in words is "twenty million, seven hundred thirteen thousand, seventy-seven".