20654730 has 64 divisors (see below), whose sum is σ = 55486080. Its totient is φ = 5467392.

The previous prime is 20654701. The next prime is 20654747. The reversal of 20654730 is 3745602.

It is a happy number.

20654730 is a `hidden beast` number, since 2 + 0 + 654 + 7 + 3 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20654694 and 20654703.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61122 + ... + 61458.

It is an arithmetic number, because the mean of its divisors is an integer number (866970).

Almost surely, 2^20654730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20654730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27743040).

20654730 is an abundant number, since it is smaller than the sum of its proper divisors (34831350).

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

20654730 is a wasteful number, since it uses less digits than its factorization.

20654730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20654730 is about 4544.7475177396. The cubic root of 20654730 is about 274.3720326819.

The spelling of 20654730 in words is "twenty million, six hundred fifty-four thousand, seven hundred thirty".