20699952 has 120 divisors (see below), whose sum is σ = 67089456. Its totient is φ = 5451264.

The previous prime is 20699947. The next prime is 20699981. The reversal of 20699952 is 25999602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30238 + ... + 30914.

Almost surely, 2^20699952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20699952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33544728).

20699952 is an abundant number, since it is smaller than the sum of its proper divisors (46389504).

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

20699952 is a wasteful number, since it uses less digits than its factorization.

20699952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 20699952 is about 4549.7199913841. The cubic root of 20699952 is about 274.5721257977.

It can be divided in two parts, 2069 and 9952, that added together give a palindrome (12021).

The spelling of 20699952 in words is "twenty million, six hundred ninety-nine thousand, nine hundred fifty-two".