20479902 has 32 divisors (see below), whose sum is σ = 42731520. Its totient is φ = 6536160.

The previous prime is 20479897. The next prime is 20479909. The reversal of 20479902 is 20997402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20479909) 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, 18624 + ... + 19692.

It is an arithmetic number, because the mean of its divisors is an integer number (1335360).

Almost surely, 2^20479902 is an apocalyptic number.

20479902 is an abundant number, since it is smaller than the sum of its proper divisors (22251618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20479902 is a wasteful number, since it uses less digits than its factorization.

20479902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

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

The square root of 20479902 is about 4525.4725720084. The cubic root of 20479902 is about 273.5957150675.

The spelling of 20479902 in words is "twenty million, four hundred seventy-nine thousand, nine hundred two".