20429542 has 8 divisors (see below), whose sum is σ = 35022096. Its totient is φ = 8755512.

The previous prime is 20429533. The next prime is 20429557. The reversal of 20429542 is 24592402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20429542.

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, 729613 + ... + 729640.

It is an arithmetic number, because the mean of its divisors is an integer number (4377762).

Almost surely, 2^20429542 is an apocalyptic number.

20429542 is a deficient number, since it is larger than the sum of its proper divisors (14592554).

20429542 is a wasteful number, since it uses less digits than its factorization.

20429542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459262.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20429542 is about 4519.9050874991. The cubic root of 20429542 is about 273.3712740644.

The spelling of 20429542 in words is "twenty million, four hundred twenty-nine thousand, five hundred forty-two".