20401776 has 30 divisors (see below), whose sum is σ = 57097040. Its totient is φ = 6800544.

The previous prime is 20401739. The next prime is 20401781. The reversal of 20401776 is 67710402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70696 + ... + 70983.

Almost surely, 2^20401776 is an apocalyptic number.

It is an amenable number.

20401776 is an abundant number, since it is smaller than the sum of its proper divisors (36695264).

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

20401776 is a wasteful number, since it uses less digits than its factorization.

20401776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141693 (or 141684 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20401776 is about 4516.8325184802. The cubic root of 20401776 is about 273.2473706808.

The spelling of 20401776 in words is "twenty million, four hundred one thousand, seven hundred seventy-six".