20557702 has 8 divisors (see below), whose sum is σ = 33639912. Its totient is φ = 9344400.

The previous prime is 20557697. The next prime is 20557711. The reversal of 20557702 is 20775502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20557702² = 845238223041608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467199 + ... + 467242.

It is an arithmetic number, because the mean of its divisors is an integer number (4204989).

Almost surely, 2^20557702 is an apocalyptic number.

20557702 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20557702 is a deficient number, since it is larger than the sum of its proper divisors (13082210).

20557702 is a wasteful number, since it uses less digits than its factorization.

20557702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934454.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 20557702 is about 4534.0602113338. The cubic root of 20557702 is about 273.9417266453.

The spelling of 20557702 in words is "twenty million, five hundred fifty-seven thousand, seven hundred two".