20925398 has 8 divisors (see below), whose sum is σ = 33802608. Its totient is φ = 9657864.

The previous prime is 20925389. The next prime is 20925433. The reversal of 20925398 is 89352902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a nialpdrome in base 9.

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, 402386 + ... + 402437.

It is an arithmetic number, because the mean of its divisors is an integer number (4225326).

Almost surely, 2^20925398 is an apocalyptic number.

20925398 is a deficient number, since it is larger than the sum of its proper divisors (12877210).

20925398 is a wasteful number, since it uses less digits than its factorization.

20925398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804838.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 20925398 is about 4574.4287075000. The cubic root of 20925398 is about 275.5653295927.

The spelling of 20925398 in words is "twenty million, nine hundred twenty-five thousand, three hundred ninety-eight".