20542810 has 16 divisors (see below), whose sum is σ = 37245600. Its totient is φ = 8157456.

The previous prime is 20542789. The next prime is 20542811. The reversal of 20542810 is 1824502.

It is a super-2 number, since 2×20542810² = 844014085392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20542811) 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, 6000 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (2327850).

Almost surely, 2^20542810 is an apocalyptic number.

20542810 is a deficient number, since it is larger than the sum of its proper divisors (16702790).

20542810 is a wasteful number, since it uses less digits than its factorization.

20542810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14925.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20542810 is about 4532.4176771344. The cubic root of 20542810 is about 273.8755628678.

The spelling of 20542810 in words is "twenty million, five hundred forty-two thousand, eight hundred ten".