20472830 has 16 divisors (see below), whose sum is σ = 42115680. Its totient is φ = 7019232.

The previous prime is 20472827. The next prime is 20472833. The reversal of 20472830 is 3827402.

It is an interprime number because it is at equal distance from previous prime (20472827) and next prime (20472833).

It is a self number, because there is not a number n which added to its sum of digits gives 20472830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146165 + ... + 146304.

It is an arithmetic number, because the mean of its divisors is an integer number (2632230).

Almost surely, 2^20472830 is an apocalyptic number.

20472830 is an abundant number, since it is smaller than the sum of its proper divisors (21642850).

20472830 is a wasteful number, since it uses less digits than its factorization.

20472830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292483.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20472830 is about 4524.6911496808. The cubic root of 20472830 is about 273.5642192844.

The spelling of 20472830 in words is "twenty million, four hundred seventy-two thousand, eight hundred thirty".