20429695 has 16 divisors (see below), whose sum is σ = 28802592. Its totient is φ = 13714560.

The previous prime is 20429663. The next prime is 20429711. The reversal of 20429695 is 59692402.

It is not a de Polignac number, because 20429695 - 2⁵ = 20429663 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13572 + ... + 15001.

It is an arithmetic number, because the mean of its divisors is an integer number (1800162).

Almost surely, 2^20429695 is an apocalyptic number.

20429695 is a deficient number, since it is larger than the sum of its proper divisors (8372897).

20429695 is a wasteful number, since it uses less digits than its factorization.

20429695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28602.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 20429695 is about 4519.9220126015. The cubic root of 20429695 is about 273.3719565026.

The spelling of 20429695 in words is "twenty million, four hundred twenty-nine thousand, six hundred ninety-five".