20642802 has 16 divisors (see below), whose sum is σ = 41986080. Its totient is φ = 6764192.

The previous prime is 20642789. The next prime is 20642821. The reversal of 20642802 is 20824602.

It is a super-2 number, since 2×20642802² = 852250548822408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28803 + ... + 29510.

It is an arithmetic number, because the mean of its divisors is an integer number (2624130).

Almost surely, 2^20642802 is an apocalyptic number.

20642802 is an abundant number, since it is smaller than the sum of its proper divisors (21343278).

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

20642802 is a wasteful number, since it uses less digits than its factorization.

20642802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58377.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20642802 is about 4543.4350441048. The cubic root of 20642802 is about 274.3192063672.

The spelling of 20642802 in words is "twenty million, six hundred forty-two thousand, eight hundred two".