20897048 has 8 divisors (see below), whose sum is σ = 39181980. Its totient is φ = 10448520.

The previous prime is 20897047. The next prime is 20897057. The reversal of 20897048 is 84079802.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20897048² = 873373230228608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20897047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1306058 + ... + 1306073.

Almost surely, 2^20897048 is an apocalyptic number.

It is an amenable number.

20897048 is a deficient number, since it is larger than the sum of its proper divisors (18284932).

20897048 is a wasteful number, since it uses less digits than its factorization.

20897048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612137 (or 2612133 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20897048 is about 4571.3289096279. The cubic root of 20897048 is about 275.4408268583.

The spelling of 20897048 in words is "twenty million, eight hundred ninety-seven thousand, forty-eight".