20730700 has 18 divisors (see below), whose sum is σ = 44985836. Its totient is φ = 8292240.

The previous prime is 20730623. The next prime is 20730719. The reversal of 20730700 is 703702.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103554 + ... + 103753.

Almost surely, 2^20730700 is an apocalyptic number.

20730700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20730700 is an abundant number, since it is smaller than the sum of its proper divisors (24255136).

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

20730700 is a wasteful number, since it uses less digits than its factorization.

20730700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207321 (or 207314 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 19.

The square root of 20730700 is about 4553.0978465216. The cubic root of 20730700 is about 274.7080096385.

The spelling of 20730700 in words is "twenty million, seven hundred thirty thousand, seven hundred".