20947260 has 24 divisors (see below), whose sum is σ = 58652496. Its totient is φ = 5585920.

The previous prime is 20947249. The next prime is 20947271. The reversal of 20947260 is 6274902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20947249) and next prime (20947271).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 174501 + ... + 174620.

It is an arithmetic number, because the mean of its divisors is an integer number (2443854).

Almost surely, 2^20947260 is an apocalyptic number.

20947260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20947260 is an abundant number, since it is smaller than the sum of its proper divisors (37705236).

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

20947260 is a wasteful number, since it uses less digits than its factorization.

20947260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349133 (or 349131 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20947260 is about 4576.8176717016. The cubic root of 20947260 is about 275.6612626535.

The spelling of 20947260 in words is "twenty million, nine hundred forty-seven thousand, two hundred sixty".