21472763 has 16 divisors (see below), whose sum is σ = 23819040. Its totient is φ = 19236096.

The previous prime is 21472757. The next prime is 21472771. The reversal of 21472763 is 36727412.

It is a cyclic number.

It is not a de Polignac number, because 21472763 - 2⁴ = 21472747 is a prime.

It is a super-2 number, since 2×21472763² = 922159101708338, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21472723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77381 + ... + 77657.

It is an arithmetic number, because the mean of its divisors is an integer number (1488690).

Almost surely, 2^21472763 is an apocalyptic number.

21472763 is a deficient number, since it is larger than the sum of its proper divisors (2346277).

21472763 is a wasteful number, since it uses less digits than its factorization.

21472763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its digits is 14112, while the sum is 32.

The square root of 21472763 is about 4633.8712757262. The cubic root of 21472763 is about 277.9474177243.

It can be divided in two parts, 214727 and 63, that multiplied together give a triangular number (13527801 = T₅₂₀₁).

The spelling of 21472763 in words is "twenty-one million, four hundred seventy-two thousand, seven hundred sixty-three".