20655378 has 16 divisors (see below), whose sum is σ = 45900960. Its totient is φ = 6885108.

The previous prime is 20655377. The next prime is 20655379. The reversal of 20655378 is 87355602.

It is an interprime number because it is at equal distance from previous prime (20655377) and next prime (20655379).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20655373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191200 + ... + 191307.

It is an arithmetic number, because the mean of its divisors is an integer number (2868810).

Almost surely, 2^20655378 is an apocalyptic number.

20655378 is an abundant number, since it is smaller than the sum of its proper divisors (25245582).

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

20655378 is a wasteful number, since it uses less digits than its factorization.

20655378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382518 (or 382512 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 20655378 is about 4544.8188082695. The cubic root of 20655378 is about 274.3749019394.

The spelling of 20655378 in words is "twenty million, six hundred fifty-five thousand, three hundred seventy-eight".