20747030 has 16 divisors (see below), whose sum is σ = 37433664. Its totient is φ = 8279040.

The previous prime is 20747011. The next prime is 20747053. The reversal of 20747030 is 3074702.

It is a junction number, because it is equal to n+sod(n) for n = 20746987 and 20747005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390 + ... + 6870.

It is an arithmetic number, because the mean of its divisors is an integer number (2339604).

Almost surely, 2^20747030 is an apocalyptic number.

20747030 is a deficient number, since it is larger than the sum of its proper divisors (16686634).

20747030 is a wasteful number, since it uses less digits than its factorization.

20747030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951.

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20747030 is about 4554.8907780538. The cubic root of 20747030 is about 274.7801217623.

The spelling of 20747030 in words is "twenty million, seven hundred forty-seven thousand, thirty".