20616486 has 16 divisors (see below), whose sum is σ = 44981568. Its totient is φ = 6247400.

The previous prime is 20616473. The next prime is 20616493. The reversal of 20616486 is 68461602.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156120 + ... + 156251.

It is an arithmetic number, because the mean of its divisors is an integer number (2811348).

Almost surely, 2^20616486 is an apocalyptic number.

20616486 is an abundant number, since it is smaller than the sum of its proper divisors (24365082).

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

20616486 is a wasteful number, since it uses less digits than its factorization.

20616486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312387.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20616486 is about 4540.5380738410. The cubic root of 20616486 is about 274.2025869590.

The spelling of 20616486 in words is "twenty million, six hundred sixteen thousand, four hundred eighty-six".