20632890 has 32 divisors (see below), whose sum is σ = 50362560. Its totient is φ = 5408384.

The previous prime is 20632889. The next prime is 20632919. The reversal of 20632890 is 9823602.

It is a super-2 number, since 2×20632890² = 851432299504200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4059 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (1573830).

Almost surely, 2^20632890 is an apocalyptic number.

20632890 is an abundant number, since it is smaller than the sum of its proper divisors (29729670).

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

20632890 is a wasteful number, since it uses less digits than its factorization.

20632890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11726.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20632890 is about 4542.3441084973. The cubic root of 20632890 is about 274.2752929603.

The spelling of 20632890 in words is "twenty million, six hundred thirty-two thousand, eight hundred ninety".