20429942 has 16 divisors (see below), whose sum is σ = 33245520. Its totient is φ = 9359712.

The previous prime is 20429923. The next prime is 20429987. The reversal of 20429942 is 24992402.

It is a junction number, because it is equal to n+sod(n) for n = 20429899 and 20429908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (2077845).

Almost surely, 2^20429942 is an apocalyptic number.

20429942 is a deficient number, since it is larger than the sum of its proper divisors (12815578).

20429942 is a wasteful number, since it uses less digits than its factorization.

20429942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20429942 is about 4519.9493359992. The cubic root of 20429942 is about 273.3730582094.

The spelling of 20429942 in words is "twenty million, four hundred twenty-nine thousand, nine hundred forty-two".