20757948 has 12 divisors (see below), whose sum is σ = 48435240. Its totient is φ = 6919312.

The previous prime is 20757929. The next prime is 20757953. The reversal of 20757948 is 84975702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×20757948³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864903 + ... + 864926.

It is an arithmetic number, because the mean of its divisors is an integer number (4036270).

Almost surely, 2^20757948 is an apocalyptic number.

It is an amenable number.

20757948 is an abundant number, since it is smaller than the sum of its proper divisors (27677292).

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

20757948 is a wasteful number, since it uses less digits than its factorization.

20757948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729836 (or 1729834 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 20757948 is about 4556.0891123858. The cubic root of 20757948 is about 274.8283137729.

The spelling of 20757948 in words is "twenty million, seven hundred fifty-seven thousand, nine hundred forty-eight".