20340425 has 24 divisors (see below), whose sum is σ = 29450496. Its totient is φ = 13645440.

The previous prime is 20340413. The next prime is 20340443. The reversal of 20340425 is 52404302.

It is not a de Polignac number, because 20340425 - 2⁴ = 20340409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20340397 and 20340406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6989 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (1227104).

Almost surely, 2^20340425 is an apocalyptic number.

20340425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20340425 is a deficient number, since it is larger than the sum of its proper divisors (9110071).

20340425 is a wasteful number, since it uses less digits than its factorization.

20340425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20340425 is about 4510.0360308982. The cubic root of 20340425 is about 272.9731979574.

Adding to 20340425 its reverse (52404302), we get a palindrome (72744727).

The spelling of 20340425 in words is "twenty million, three hundred forty thousand, four hundred twenty-five".