20777460 has 48 divisors (see below), whose sum is σ = 63467712. Its totient is φ = 5036800.

The previous prime is 20777443. The next prime is 20777483. The reversal of 20777460 is 6477702.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15081 + ... + 16400.

It is an arithmetic number, because the mean of its divisors is an integer number (1322244).

Almost surely, 2^20777460 is an apocalyptic number.

20777460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20777460 is an abundant number, since it is smaller than the sum of its proper divisors (42690252).

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

20777460 is a wasteful number, since it uses less digits than its factorization.

20777460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31504 (or 31502 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 20777460 is about 4558.2299196070. The cubic root of 20777460 is about 274.9143975987.

The spelling of 20777460 in words is "twenty million, seven hundred seventy-seven thousand, four hundred sixty".