20357425 has 12 divisors (see below), whose sum is σ = 27538416. Its totient is φ = 14805200.

The previous prime is 20357411. The next prime is 20357453. The reversal of 20357425 is 52475302.

20357425 = T₂₃₉ + T₂₄₀ + ... + T₅₁₃.

It is not a de Polignac number, because 20357425 - 2¹⁵ = 20324657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20357393 and 20357402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36739 + ... + 37288.

It is an arithmetic number, because the mean of its divisors is an integer number (2294868).

Almost surely, 2^20357425 is an apocalyptic number.

20357425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20357425 is a deficient number, since it is larger than the sum of its proper divisors (7180991).

20357425 is a wasteful number, since it uses less digits than its factorization.

20357425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74048 (or 74043 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 20357425 is about 4511.9203228781. The cubic root of 20357425 is about 273.0492247554.

The spelling of 20357425 in words is "twenty million, three hundred fifty-seven thousand, four hundred twenty-five".