20557662 has 8 divisors (see below), whose sum is σ = 41115336. Its totient is φ = 6852552.

The previous prime is 20557651. The next prime is 20557673. The reversal of 20557662 is 26675502.

It is an interprime number because it is at equal distance from previous prime (20557651) and next prime (20557673).

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

20557662 is an admirable number.

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, 1713133 + ... + 1713144.

It is an arithmetic number, because the mean of its divisors is an integer number (5139417).

Almost surely, 2^20557662 is an apocalyptic number.

20557662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20557662 is a wasteful number, since it uses less digits than its factorization.

20557662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426282.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20557662 is about 4534.0558002742. The cubic root of 20557662 is about 273.9415489718.

The spelling of 20557662 in words is "twenty million, five hundred fifty-seven thousand, six hundred sixty-two".