20429356 has 12 divisors (see below), whose sum is σ = 35820568. Its totient is φ = 10194912.

The previous prime is 20429333. The next prime is 20429363. The reversal of 20429356 is 65392402.

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, 2481 + ... + 6856.

Almost surely, 2^20429356 is an apocalyptic number.

It is an amenable number.

20429356 is a deficient number, since it is larger than the sum of its proper divisors (15391212).

20429356 is a wasteful number, since it uses less digits than its factorization.

20429356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9888 (or 9886 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20429356 is about 4519.8845117989. The cubic root of 20429356 is about 273.3704444290.

The spelling of 20429356 in words is "twenty million, four hundred twenty-nine thousand, three hundred fifty-six".