20297672 has 16 divisors (see below), whose sum is σ = 38106240. Its totient is φ = 10136016.

The previous prime is 20297671. The next prime is 20297713. The reversal of 20297672 is 27679202.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20297671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10493 + ... + 12275.

It is an arithmetic number, because the mean of its divisors is an integer number (2381640).

Almost surely, 2^20297672 is an apocalyptic number.

It is an amenable number.

20297672 is a deficient number, since it is larger than the sum of its proper divisors (17808568).

20297672 is a wasteful number, since it uses less digits than its factorization.

20297672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20297672 is about 4505.2937751050. The cubic root of 20297672 is about 272.7818120960.

The spelling of 20297672 in words is "twenty million, two hundred ninety-seven thousand, six hundred seventy-two".