20790429 has 16 divisors (see below), whose sum is σ = 31217664. Its totient is φ = 12193200.

The previous prime is 20790409. The next prime is 20790431. The reversal of 20790429 is 92409702.

It is not a de Polignac number, because 20790429 - 2⁸ = 20790173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 20790429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9139 + ... + 11184.

It is an arithmetic number, because the mean of its divisors is an integer number (1951104).

Almost surely, 2^20790429 is an apocalyptic number.

It is an amenable number.

20790429 is a deficient number, since it is larger than the sum of its proper divisors (10427235).

20790429 is a wasteful number, since it uses less digits than its factorization.

20790429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20368.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20790429 is about 4559.6522893747. The cubic root of 20790429 is about 274.9715849428.

The spelling of 20790429 in words is "twenty million, seven hundred ninety thousand, four hundred twenty-nine".